ALLDAY PROJECT Member Profiles: Pre-Debut Achievements Revealed

K-pop co-ed groups are a rarity in the industry, with ADP bringing fresh energy as only the second mixed-gender group to debut since KARD in 2017. Set to make their official debut on June 23, 2025, with the single "FAMOUS," this five-member group under THEBLACKLABEL has already generated significant buzz in the K-pop community.

ALLDAY PROJECT (올데이프로젝트) consists of five uniquely talented individuals: Annie, Tarzzan, Bailey, Woochan, and Youngseo. What makes this group particularly intriguing is their diverse pre-debut backgrounds - from a world-famous choreographer to a former rap prodigy, a chaebol, a fashion model, and even a former ILLIT member. Additionally, the group is produced by Teddy, the musical mastermind behind numerous BLACKPINK hits, further elevating expectations for their debut.

Unlike many new K-pop acts, ALLDAY PROJECT has boldly declared they "would not follow existing trends" but instead "become a new trend itself". With their music video release scheduled for June 16, 2025, followed by their official debut a week later, the group represents THEBLACKLABEL's second venture into idol groups after girl group MEOVV.

ALLDAY PROJECT’s Unique Pre-Debut Blend

What makes ALLDAY PROJECT truly stand out in the K-pop landscape is not just their co-ed format, but the extraordinary convergence of talents with established pre-debut careers. This unprecedented assembly of industry veterans represents a new approach to group formation, where members bring fully developed professional identities rather than being molded from scratch.

How diverse backgrounds shaped the group

The quintet's diverse backgrounds create a unique synergy unmatched in the industry. Annie's chaebol connections provide business acumen, Tarzzan brings contemporary dance expertise, Bailey contributes world-class choreography experience, Woochan delivers seasoned rap skills, and Youngseo adds vocal stability. This combination of talents enables ALLDAY PROJECT to handle nearly every aspect of production internally.

"We wanted to create something that had never been done before," explains Teddy, THEBLACKLABEL's founder. "Each member brings a completely different strength to the table, yet somehow they fit together perfectly."

Their collective experience spans:

Professional choreography for top K-pop acts
International dance instruction
Television appearances and competitions
Solo music releases
Modeling careers
Survival show training

The role of THEBLACKLABEL in uniting them

THEBLACKLABEL's vision for ALLDAY PROJECT stemmed from Teddy's desire to create a self-sufficient group. After working with BLACKPINK, he recognized the potential of assembling individuals with established careers rather than traditional trainees.

Consequently, the label sought out members who had already proven themselves professionally. This strategy minimized the typical idol training period, allowing the group to focus on cohesion rather than skill development.

Why their pre-debut stories matter

The members' pre-debut journeys fundamentally shape ALLDAY PROJECT's identity and capabilities. Unlike traditional K-pop groups where members build their personas after debut, ADP members bring established followings and skill sets.

This approach represents a paradigm shift in idol development—acknowledging that experience outside traditional training systems can be equally valuable. Henceforth, their diverse backgrounds not only differentiate them in a crowded market but potentially redefine what constitutes an "idol" in the evolving K-pop landscape.

The Role of THEBLACKLABEL in Shaping ADP

Founded in 2016, THEBLACKLABEL stands at the forefront of K-pop innovation under Teddy Park's leadership, with ALLDAY PROJECT representing their boldest venture yet. As their second group following MEOVV, ADP emerged from a distinct creative philosophy that prioritizes artistic integrity over industry conventions.

Teddy's vision for ALLDAY PROJECT

Teddy Park, renowned for producing BLACKPINK's global hits, envisioned ADP as more than just another K-pop act. His philosophy centers on cultivating artists who are "bold, distinctive, and uncompromising—aspiring to become a lasting force in art beyond fleeting trends". This vision materialized through the group's debut single "Famous," showcasing the "unprecedented music produced by Teddy" that the label promised.

Fundamentally, Teddy approached ADP with the confidence that "the world doesn't know ALLDAY PROJECT yet, but this project is ready". This statement reflects his certainty in the group's potential to redefine industry standards through their unique composition and sound.

How the label curated the lineup

THEBLACKLABEL assembled ADP without conventional constraints, claiming they formed the team "without bias", simply "following the music" rather than deliberately setting out to break barriers. The company selected members based on "public recognition and talent", resulting in a lineup where "each [member], regardless of their debut year or gender, [has] strong individuality".

This strategic curation produced a group featuring "a corporate heiress, a former trainee, a young rapper, a popular dancer, and a model". Remarkably, Annie was originally part of MEOVV's pre-debut lineup, demonstrating the label's flexible approach to team composition.

The impact of pre-debut experience on debut

ADP's pre-debut backgrounds significantly enhanced their debut impact. The members' established careers enabled them to bypass typical rookie struggles, straightaway claiming attention as "one of the most talked-about pre-debut talents of their generation".

Given these points, the label adopted "a more aggressive, fan-focused approach" for ADP, contrasting with MEOVV's "mysterious" early strategy. This approach helped the group "push the boundaries of creative expression, challenge convention, and deliver something entirely new", potentially sparking "a new conversation" about what defines K-pop in 2025.

Annie: From Chaebol Heiress to K-Pop Rapper

In the evolving landscape of K-pop, Annie (Moon Seo-yoon) stands out as a groundbreaking figure who has shattered industry norms. As the first member from a major chaebol family to pursue an idol career, her story represents a dramatic departure from traditional expectations placed on heirs of Korea's business elite.

Annie's pre-debut background

Born in 2002, Annie is the eldest daughter of Chung Yoo-kyung, president of Shinsegae's department store division. Her journey into entertainment began at age seven when she stumbled upon the music video for "Lollipop" by 2NE1 and Big Bang. "It was so shocking — like a whole new world had opened up to me," she recalled. This pivotal moment ignited her passion for music and performance, setting her on an unexpected path that diverged from her family's business-oriented trajectory.

Despite her early interest in music, Annie faced considerable obstacles. "It wasn't easy. My family was very opposed to the idea," she revealed in a candid interview. This opposition stemmed from the unconventional nature of her chosen career, especially considering her prestigious background.

Annie's family legacy and education

Annie's lineage places her at the intersection of two of Korea's most powerful business empires:

Great-grandfather: Lee Byung-chul, founder of Samsung Group
Grandmother: Lee Myung-hee, chairwoman of Shinsegae Group
Mother: Chung Yoo-kyung, president of Shinsegae's department store division
Father: Moon Sung Wook, former Minister of Trade, Industry and Energy (2021-2022)

Shinsegae Group ranks as Korea's second-largest retailer after Lotte and stands 11th among all Korean conglomerates in terms of total assets. The conglomerate operates through two main ventures: department stores (controlled by Annie's mother) and the supermarket chain Emart (led by her uncle, Chung Yong-jin).

Regarding education, Annie secured admission to Columbia University, where she majors in Art History. Her academic achievement became a turning point in her pursuit of an entertainment career. "After I was accepted into Columbia University, I was finally able to persuade them," she explained. According to reports, her mother had proposed a condition: if Annie could gain admission to Columbia (her grandfather's alma mater), she would receive full support for her music aspirations.

Annie's industry connections

Although Annie entered the industry without leveraging her family connections, her pre-debut journey intersected with several notable projects. Prior to joining ALLDAY PROJECT, she was spotted in pictures at a dance studio with trainees from girl group MEOVV, THEBLACKLABEL's first idol project. Moreover, she was reportedly part of the pre-debut lineup for MEOVV before moving to ALLDAY PROJECT.

Annie's training journey

Annie and TARZZAN were the first two members to join ALLDAY PROJECT. She recalled, "The start of ALLDAY PROJECT was when TARZZAN and I first met. 'You're a team now so you two figure out how to get close.' That's what TEDDY PD said at the time".

Throughout her training, Annie worked diligently to prove herself. "People often doubt whether I'm really serious about this path, so I've had to show more to prove how much it means to me," she shared. Her determination culminated in the group's debut on June 23, 2025, with the digital single "Famous".

Annie's social media presence

As a member of ALLDAY PROJECT, Annie has cultivated a distinctive online persona characterized by her cool, confident aura and fashion sense. She frequently appears in Y2K-inspired outfits, including crop tops and low-rise jeans. Her unique background and style have made her one of the most talked-about rookies of 2025, garnering attention for both her visuals and stage presence.

Tarzzan: The Dance Prodigy Turned Idol

Behind the bold image of ALLDAY PROJECT's resident dancer lies a journey marked by artistic excellence and transformation. Lee Chaewon, known professionally as Tarzzan, brings a unique blend of contemporary dance expertise and modeling experience to the group, establishing himself as a multifaceted performer well before his idol debut.

Tarzzan's pre-debut dance career

Tarzzan's passion for movement began through an unexpected family connection - his cousin, a professional ballerina, introduced him to contemporary dance during his formative years. This early exposure sparked a lifelong dedication to the art form. His talent quickly became apparent as he achieved remarkable success in competitive dance, securing gold medals at both the 49th and 50th Dong-A International Contemporary Dance Competitions.

His excellence in dance continued with a grand prize win at the 2021 Tanzolymp Asia Grand Prix, cementing his reputation in Korea's contemporary dance community. Notably, his 2021 performance piece titled "Loosing Control" showcased his distinctive style characterized by floor work and unrestrained, animalistic movements. This performance possibly contributed to his stage name "Tarzzan," which he has fully embraced.

Tarzzan's modeling and fashion work

Alongside his dance career, Tarzzan ventured into fashion, making his modeling debut at Seoul Fashion Week 2022. Under YG KPlus management, he quickly established himself in the fashion industry, working with several prominent global brands and appearing in editorial spreads.

His natural charisma, widely attributed to his modeling background, has become one of his defining characteristics as a performer. This quality has helped him develop a strong stage presence that Korean netizens have responded to favorably, with many noting he "would've done well even as a solo artist".

Tarzzan's education in performing arts

Throughout his artistic development, Tarzzan maintained a commitment to formal education in the arts. He graduated from Busan Arts High School, where he honed his performance skills among other talented young artists. Currently, he continues his education at the prestigious Korea National University of Arts, where he majors in contemporary dance.

His educational journey reflects a deeper interest in dance that goes beyond casual performance. In pre-debut interviews, Tarzzan mentioned that while in elementary school, he lived briefly in the United States, where he developed an appreciation for hip-hop. Upon returning to Korea, he continued his dance education, at one point expressing admiration for the Alvin Ailey Dance Company.

Tarzzan's music video appearances

Before joining ALLDAY PROJECT, Tarzzan gained industry experience through appearances in prominent K-pop music videos. He was featured in (G)I-DLE's "I Do" in 2023, demonstrating his dance abilities in a professional setting. More recently, he appeared in NewJeans' "Supernatural" music video released in 2024, which further exposed him to the K-pop audience.

These appearances served as valuable experience in the idol industry, allowing him to understand music video production and performance requirements before his official debut with ALLDAY PROJECT.

Tarzzan's social media presence

Tarzzan's social media presence reveals the fascinating duality of his persona. His Instagram handle "tarzzan_boy" showcases his embrace of the nickname that would eventually become his stage name.

While his current image features bold styling choices including various braided hairstyles and grills, resurfaced pre-debut photos show a dramatically different side. These images, including what appears to be a school yearbook photo, reveal a "soft" appearance with a clean, simple haircut that contrasts sharply with his current stage persona.

This striking transformation has fascinated Korean netizens, with many expressing surprise at the contrast. Comments such as "He styled himself to look like a thug, but his natural face is soft and good-looking" highlight the effective image evolution Tarzzan has undergone. This duality between his natural features and bold styling has become part of his appeal, with fans appreciating both aspects of his persona.

Bailey: Viral Choreographer to K-Pop Star

From viral dance videos to choreographing for K-pop's biggest stars, Bailey Sok's path to ALLDAY PROJECT represents a remarkable career reversal. Unlike most idols who choreograph after debut, this multi-talented performer brings years of professional dance expertise to her idol journey.

Bailey's early dance journey

Born on February 24, 2004, in Placentia, Orange County, California, Bailey Drew Sok began her dance journey remarkably early. Influenced by her two older sisters who were actively involved in dance, Bailey started moving to music at just two and a half years old. Her mother, who was crowned Miss Korea, provided a strong cultural and artistic foundation for her development.

By age five, she was attending summer intensives in Los Angeles with renowned choreographer Matt Steffanina. Her formal training included classical styles such as jazz, ballet, and tap under the direction of Molly Long. At merely six years old, Bailey was already participating in dance competitions, transitioning her focus to hip-hop by age ten.

Her breakthrough moment came through YouTube, where her performance from the KAR Dance Competition amassed millions of views overnight. First, she appeared on America's Got Talent Season 9 with the all-girl dance group Buns & Roses at just ten years old. Subsequently, she competed alongside Kida the Great in Season 4 of NBC's World of Dance.

Bailey's choreography portfolio

At fifteen, Bailey co-choreographed Red Velvet's lead single "Psycho," marking her entry into K-pop choreography. Her impressive portfolio expanded to include work for numerous high-profile artists:

Taemin's "Idea" (2020)
SHINee's "Don't Call Me" (2021)
aespa's "Savage" (2021) and "Spicy"
Kai's "Peaches"
Taeyang's "Vibe" featuring Jimin and "Shoong!" featuring Lisa (2023)
Lisa's "Money" new dance break

Furthermore, she participated in choreographing K/DA's 'POP/STARS' and 'Drum Go Dum' for League of Legends' virtual K-pop group. Her work extended to creating a dance break for Lisa's "Money" performance at BLACKPINK's BST Hyde Park 2023 concert in London.

Bailey's international recognition

By fourteen, Bailey had transformed from student to teacher, leading dance classes across multiple continents. Her international teaching resume spans the United States, Australia, France, Japan, Korea, China, and Poland. At Fair Play Dance Camp in Kraków, she became their youngest instructor ever.

Her excellence earned her "Rising Star of the Year" at the Arena Awards in 2019. Additionally, she received "Dance Creator of the Year" at Adweek's Creator Visionary in 2023. Beyond teaching, Bailey collaborated with prominent artists including Janet Jackson, Jason Derulo, Meghan Trainor, and Marshmello.

Bailey's transition to idol life

In February 2024, leaked photos of THEBLACKLABEL trainees, including Bailey, began circulating online. Initially rumored to be part of the agency's upcoming girl group MEOVV, she ultimately did not make that lineup. Instead, on June 9, 2025, THEBLACKLABEL announced Bailey as a member of ALLDAY PROJECT.

The group made their debut with the single album "Famous" on June 23, 2025. Beyond performing, Bailey also participated in the lyrical composition of "Wicked," showcasing her multifaceted creative abilities.

Bailey's social media presence

Prior to her debut, Bailey had already established herself as a successful influencer with over 1.84 million Instagram followers and 2.2 million TikTok followers as of June 2025. Her platforms include Instagram (@baileysok), YouTube (BaileySok), Twitter/X (@Baileysok1), TikTok (@baileysok1), and Facebook (@Baileysok13).

Previously, she uploaded dance videos, challenges, and vlogs to her YouTube channel—now set to private—all managed by her mother. Her transition from dance content creator to idol has fascinated fans worldwide, creating a unique bridge between the choreography and performance worlds.

Woochan: Rap Prodigy with a Solo Past

Jo Woochan emerges as ALLDAY PROJECT's youngest member with perhaps the most established career, bringing years of professional rap experience to the co-ed group. His journey from child rap prodigy to seasoned performer offers a glimpse into the evolving Korean hip-hop landscape.

Woochan's early rap career

Born January 20, 2005, in Seoul, South Korea, Woochan spent his early childhood in Perth, Australia after relocating with his family at age two. Upon returning to Korea, he initially pursued dance before discovering his passion for rap. Interestingly, his first love was dance, which preceded his development as a rapper.

The young artist underwent comprehensive training early in his career. During his audition for Cube Entertainment, he demonstrated remarkable versatility by showcasing rapping, singing, and dancing skills. This multifaceted approach would become a hallmark of his artistic identity throughout his career.

Woochan's TV and music show appearances

Woochan catapulted to national recognition in 2017 through his historic appearance on "Show Me The Money 6," becoming the youngest contestant in the show's history at just 12 years old. Despite his youth, he advanced to the semi-finals, earning the nickname "Lil Dok2" and leaving a lasting impression on both viewers and industry professionals.

Even before SMTM6, Woochan was no stranger to television. As a seven-year-old, he appeared on the EBS reality show "Baby Alone" (유아독존), charming viewers with his wit and compassion. His early entertainment career additionally included numerous commercials, including appearances with football legend Hong Myung-bo and actress Kim Nam-joo.

His television resume expanded to include:

"Hyena on the Keyboard" (2017) - featured on Hui's song "Wake me up"
"Father's Sword" - JTBC short film by Director Jeong Yoon-cheol (2017)
"FLEX ZONE" - Stone Music Entertainment regular (2019)

Woochan's solo debut and mixtape

Following his departure from Cube Entertainment in July 2019, Woochan focused on school while continuing to create music independently. That same month, he released his first digital single album, "ID Schoolboy Pt.1", marking his official solo debut.

His discography quickly expanded with subsequent releases:

"ID Schoolboy Pt.2" (August 13, 2019)
"ID Schoolboy Pt.3" - his first extended play (May 16, 2020)
"BLANK" - his second EP released on April 13, 2024

Throughout his solo career, Woochan collaborated with several prominent artists. During SMTM6, he released three collaboration singles: "1/N" with Dynamic Duo, "What You Call Is The Price" featuring Nucksal, and "VVIP" featuring Sik-K. Dynamic Duo praised his "broad spectrum of talent and mental maturity beyond his age".

Woochan's training under major labels

Woochan's career trajectory includes training periods under several major entertainment companies. Initially a Cube Entertainment trainee, he demonstrated versatility from the outset. In January 2018, he participated in OG SCHOOL PROJECT, a joint venture between Cube and Starship Entertainment, releasing the single "OGZ" alongside Park Hyun-jin and Achillo.

After leaving Cube in 2019, Woochan subsequently joined Big Hit Music's pre-debut team, Trainee A. Though initially positioned for debut, the group's launch was ultimately canceled at the end of 2022. Following this setback, he transferred to THEBLACKLABEL, where he joined ALLDAY PROJECT.

Woochan officially debuted with ALLDAY on June 23, 2025, with the single "Famous". The music video quickly dominated online discussions, amassing over 5 million views in just 40 hours.

Woochan's social media presence

Woochan maintains an active online presence through several platforms. His Instagram handle @jowoochan_santa references his memorable SMTM6 moment when competitor Woo Won-jae delivered the line: "Don't worry, it's okay to cry. Santa isn't real". Rather than shying away from this incident, Woochan embraced it as part of his personal brand.

He additionally operates a YouTube channel @JOWOOCHAN0120, where he has shared his musical journey. Currently, he attends Hongik University studying Practical Music after graduating from Hanlim Multi Art School earlier in 2025.

Throughout his online presence, Woochan reveals personal details that humanize the young performer. His favorite colors are black and white, he enjoys sushi and sweets, and his hobbies include exercising, soccer, traveling, and dancing.

Youngseo: Survival Show Finalist to Vocalist

Lee Youngseo represents the maknae of ALLDAY PROJECT with a journey that showcases resilience after narrowly missing debut opportunities with multiple high-profile groups.

Youngseo's pre-debut training history

Youngseo began her trainee journey remarkably early, after being street-cast in front of her elementary school. She entered the trainee life in her first year of middle school, spending four years at Source Music and two years at BELIFT LAB. Under the nickname "Cherry Grapefruit," she had previously been active on YouTube and was a finalist in the 3rd Kids Creator Contest.

Due to her extensive training period, Youngseo mentioned having several friends who debuted as idols. Among them, she trained the longest with members who would later become NewJeans. This early connection to successful groups foreshadowed her own eventual debut.

Youngseo's time on R U Next?

In June 2023, Youngseo gained widespread attention as a contestant on JTBC's survival show "R U Next?" Her vocal abilities and stage presence quickly earned her a substantial fanbase. By the show's finale, she secured an impressive second-place ranking, guaranteeing her position in the debut lineup for what would become ILLIT.

Youngseo's near-debut with ILLIT

Yet in a surprising turn of events, on January 5, 2024, BELIFT LAB announced Youngseo had terminated her contract by mutual agreement. This announcement came shortly before ILLIT's official debut, leaving fans confused and heartbroken. After departing HYBE, Youngseo revealed she worried about being "too old" to debut despite being just 19 years old.

Nevertheless, her determination persisted. Rather than giving up, she took a proactive approach—personally sending DMs and clips of her performances to different entertainment companies. Her efforts paid off when THEBLACKLABEL recognized her potential.

Youngseo's hobbies and personality

Beyond her professional journey, Youngseo possesses a multifaceted personality. Though her first impression appears chic and elegant, she maintains a playful, energetic nature. Her interests include:

Creating beaded rings and collecting stickers
Visiting cat cafes and watching cat videos
Everything pink-related and cherry-shaped items

As ALLDAY PROJECT's only vocal position member, she effectively serves as the main vocalist, bringing a thin, light tone that complements the group's heavier voices.

Youngseo's social media presence

On June 5, 2025, Youngseo officially opened her personal Instagram account @youngseo. Fans quickly noticed the account was connected to THEBLACKLABEL's domain, confirming rumors of her new agency affiliation. Her social media presence showcases her fondness for pink aesthetics and cherry motifs, reflecting her bright personality despite her professional challenges.