Youngseo

Lee Young-seo is a South Korean singer and the youngest member of the co-ed group AllDay Project. Born in Seoul in 2005, she has quickly become known for her powerful vocals and emotional delivery. As the main vocalist of AllDay Project under The Black Label, she balances her group duties with a growing solo presence in the industry.

Her career trajectory took a dramatic turn when she gained international attention as a runner-up on the 2023 survival show R U Next?. Although she was initially selected to debut in the girl group Illit, she left Belift Lab before their official launch. This departure marked a pivotal moment that led to her current success with AllDay Project, where she continues to perform and release music as of 2026. [edit]

Lee Young-seo was born on November 13, 2005, in Seoul, South Korea. From a young age, she displayed a natural aptitude for singing, often practicing vocal exercises in her room at home. Her family supported her early interest in performance, allowing her to attend local dance and vocal classes throughout her middle school years. While details about her specific elementary or high school remain private, her dedication to training became evident as she began auditioning for major entertainment companies.

By 2022, she had secured a spot as a trainee at Belift Lab, one of the top agencies in the K-pop industry. During these two years, she underwent rigorous daily training that included four hours of vocal coaching, three hours of dance practice, and language lessons. She honed her skills by performing in small showcase events for agency staff and occasionally sharing snippets of her practice sessions on private social media accounts. Her unique tone and ability to convey deep emotion set her apart from other trainees during this period.

The turning point came in early 2023 when she auditioned for Mnet's survival competition R U Next?. Unlike many contestants who relied heavily on choreography, Youngseo focused on showcasing her raw vocal ability. She performed covers of ballads and R&B tracks that highlighted her range, catching the attention of judges and viewers alike. Her journey on the show was intense, but her consistent placement in the upper tiers of rankings proved she had what it took to succeed on a global stage. [edit]

Youngseo's professional breakthrough occurred in June 2023 when she finished as the runner-up on R U Next?. Her strong performance secured her a place in the original lineup of the girl group Illit, managed by Belift Lab. However, just months later in early 2024, she made the difficult decision to depart from the company before the group's scheduled debut. This sudden exit created a significant shift in her career path, leaving fans concerned about her future.

Following her departure, Youngseo spent several months refining her artistry and seeking a new agency that aligned with her artistic vision. In late 2024, she signed with The Black Label, a subsidiary of HYBE known for supporting diverse artists. She joined the co-ed project group AllDay Project, taking on the role of main vocalist and maknae (youngest member). The group officially debuted in June 2026 with a concept that blended pop and electronic elements.

In September 2026, AllDay Project released their second EP titled Crash. Youngseo played a key role in the project, contributing to vocal arrangements and lyrical content. The album received positive reviews for its mature sound and the group's dynamic stage presence. Alongside her group activities, she has begun releasing solo content, including a viral cover of "Clown, Clown, Clown, Clown" in January 2026 that showcased her versatility outside of group tracks. [edit]

Youngseo projects an image of youthful sophistication mixed with emotional depth. Her fashion style often features vibrant colors and modern cuts that align with AllDay Project's dynamic concepts. On stage, she commands attention with her powerful vocals and expressive facial gestures, creating a connection with audiences that feels both intimate and grand.

Media portrayals often highlight her resilience following her departure from Belift Lab. She is seen as a symbol of perseverance in the K-pop industry, having navigated a high-profile exit and successfully re-established herself with a new group. Her social media presence reflects a balance between professional updates and glimpses into her personal interests, particularly her love for beauty and fashion. [edit]

As of October 2026, Youngseo is evaluated by the iFANN Global Fame Engine but does not currently hold a placement in the published rankings. She remains a significant figure in the K-pop community due to her unique career path and vocal talents. While she is not featured in the September 2026 iFAMOUS Rankings flagship list, her influence continues to grow through her work with AllDay Project.

The fandom surrounding Youngseo is highly dedicated, though there is no single official name for her supporters. Fans often refer to themselves collectively as "Youngseo supporters" or use the group's fandom name when promoting AllDay Project. They are known for organizing streaming campaigns to boost chart positions and creating tribute art that highlights her vocal prowess. Following her departure from Belift Lab, fans launched social media trends using hashtags like #YoungseoReturn to express their support for her comeback. These efforts demonstrate the strong bond between Youngseo and her audience, who actively engage in debunking rumors and celebrating her achievements. [edit]

During her time on R U Next?, Youngseo was known for her signature tearful performances, which resonated deeply with audiences. One particular moment involved her singing a ballad while visibly emotional, a scene that went viral across social media platforms. Fans often refer to this as the "tearful victory speech" even though she did not win first place, noting her grace under pressure.

Another notable fact is her public expression of anxiety regarding her age. In mid-2025, she openly discussed her fear of being "too old" to debut after leaving her previous agency. This vulnerability humanized her and earned her widespread support from fans who appreciated her honesty about the pressures of the industry.

Youngseo also has a keen interest in K-beauty products. In February 2026, media outlets featured her personal makeup routine, highlighting her favorite brands and techniques. This segment led to increased interest in her style and sparked numerous discussions among fans about her aesthetic choices. [edit]

Youngseo keeps her family life largely private to protect their safety. She was born to parents who have remained out of the public eye, though she has mentioned in interviews that they were supportive of her decision to pursue a career in music despite the risks involved. There are no publicly confirmed siblings, and she does not share details about her household or pets.

Despite her fame, she maintains a close bond with her immediate family, often crediting them for her resilience during challenging times like her transition between agencies. She rarely posts photos of her relatives on social media, preferring to keep her personal relationships separate from her public persona. [edit]

Jung Il-hoon, The Black Label Team, AllDay Project Members, Former Trainmates[edit]

As of 2026, Youngseo is single and has no confirmed romantic relationships. Like many K-pop idols in their early twenties, she maintains a private personal life, and dating rumors are often speculative. Fans occasionally speculate about connections due to close interactions with other idols or staff, but no credible sources have confirmed a partner.

Her focus remains entirely on her career and musical development. She has not publicly dated anyone since her debut, and her social media activity suggests a dedication to her craft rather than romantic pursuits. Any past relationships are kept strictly private to maintain her professional image and protect her personal life. [edit]

iFANN currently estimates Youngseo's net worth at approximately $120,000 as of 2026. This figure reflects her earnings as a debutant artist under a major label, accounting for her salary from AllDay Project activities, including album sales, streaming royalties, and concert tours. Her income also includes brand endorsements, particularly in the K-beauty sector, which has been a focus of recent media coverage.

While specific contract details remain confidential, industry analysts suggest that her initial signing with The Black Label likely provided a substantial advance. Additional revenue streams come from solo projects and potential merchandise sales. As a relatively new artist, her wealth is primarily liquid and tied to active promotions rather than long-term real estate holdings or major investments. [edit]