Two images allegedly of The Black Label’s rookie girl group circulating on social media have ignited discussions, with netizens quick to spot a trainee bearing a striking resemblance to the affluent Moon Seo Yoon, also known as Annie Moon.

Moon Seo Yoon

Born in 2002, Moon Seo Yoon is part of the prestigious 4th generation of the Samsung family. Her lineage is nothing short of remarkable, with her grandmother, Lee Myung Hee, serving as the chairwoman of Shinsegae Group, Korea’s largest distributor of luxury goods.

Lee Myung Hee herself is the youngest daughter of Lee Byung Chul, the founder of the Samsung Group. Adding to the family’s prominence, Moon Seo Yoon’s mother, Chung Yoo Kyung, is the CEO of Shinsegae’s grocery store department.

Moon Seo Yoon

With her privileged background, Moon Seo Yoon pursued her education at Columbia University. She is renowned for her opulent lifestyle and luxury fashion. 

Her Instagram, once a window into her glamorous world, has now gone private, adding an air of mystery to the potential K-pop debut.

And the rumors become true! In 2025, Moon Seo Yoon is confirmed to make her debut as a K-pop idol under ALLDAY Project, a music label founded and led by producer Teddy. The announcement was made public on June 9, 2025 through THE BLACK LABEL’s official social media platforms.

The new idol group will debut as a co-ed ensemble, featuring both male and female members. The lineup includes Youngseo, an ex-member of HYBE’s girl group ILLIT, rapper Jo Woo Chan (formerly of BIGHIT and known from Show Me the Money 6), renowned dancer Bailey Sok, model Lee Chae Won, and Moon Seo Yoon herself.