The IOI members are survivors of the 101 contestants on Mnet's K-pop survival show, "Produce 101." The 11 finalists, who became IOI, dropped an album last spring. "Dream Girls," the title track, was a hit.
Now, 7 of the 11 are back: Jeon So Mi (JYP), Kim Chung Ha (H&M), Kim So Hye (Red Line), Choi Yoo Jung (Fantasio), Joo Gyung Kyung (Pledis), Kim Do Yeon (Fantasio) and Im Na Young (Pledis).
Since a couple of the girls who dropped out were strong vocalists, "the girls [who are left] are taking vocal lessons and practicing dance moves," a YMC Entertainment staffer told Naver News.
In other K-pop news from Fashion & Style, the Wonder Girls — Yubin, Yeeun, Sunmi and Hyerim — have reunited. The new single, "Why So Lonely," came out July 5.
Meanwhile, former Wonder Girls member Sohee will star in the K-drama "Entourage," based on the HBO series. She'll play herself.