Biography
I.O.I was a South Korean girl group formed by CJ E&M through the 2016 reality show Produce 101 on Mnet. The group is composed of eleven members chosen from a pool of 101 trainees from various entertainment companies. The final lineup consists of: Somi (JYP), Sejeong (JellyFish), Yoojung (Fantagio), Chungha (M&H), Sohye (Redline), Jieqiong (Pledis), Chaeyeon (MBK), Doyeon (Fantagio), Mina (JellyFish), Nayoung (Pledis) and Yeonjung (Starship).
They debuted on May 4, 2016 with a mini-album Chrysalis with a title track "Dream Girls", and are expected to actively promote four albums, either as a whole or as sub-units, over the next 10 months.
Prior to Produce 101, some of the members of I.O.I gained recognition after appearing on other television shows: Sejeong was a contestant on competition show K-pop Star 2 in 2012, Somi was a member of 2015 reality survival show Sixteen and Yoojung appeared on web drama "To Be Continued". In September 2015, Chaeyeon debuted as a member of DIA but temporarily withdrew the group to join Produce 101. She also had a cameo appearance on 2015 web drama "Sweet Temptation".
I.O.I officially debuted on May 4, 2016 through the release of their first mini-album and music video for title track "Dream Girls". The song is a trap pop dance track co-written by producer Famousbro and composer Paul with rap lyrics written by members Lim Na-young and Choi Yoo-jung.
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