Turns out, the mysterious singer on David Oh’s Instagram post is A Pink’s Yoon Bomi ! If you didn’t already know, David Oh is a participant of MBC’s ‘Star Audition’ and he has been teasing that a member of a girl group would appear in his debut album. Bomi will be collaborating with David Oh for a duet for his upcoming debut album, ‘Song Start (노래 시작)’. Bomi’s sweet vocals can definitely add an extra feel of cuteness to the song ! Fans are all really excited to hear their song and the album is going to be out on May 11th. Be sure to check out their sweet duet!