"Whatta Man" (also known as "Whatta Man (Good Man)") is a song recorded by South Korean girl group project I.O.I. The song samples the 1963's song "What a Man" by Linda Lyndell. The song was released as a single album by the first sub-unit of the group, with members Nayoung, Chungha, Jieqiong, Sohye, Yoojung, Doyeon and Somi. It was released as a digital download by YMC Entertainment and distribuited by LOEN Entertainment on August 9, 2016 and as a physical single on August 11. The lyrics were written by Seo Jeonga and the music was composed by Ryan S. Jhun, Emile Ghantous, Steve Daly, Keith Hetrick, Nikki Flores, Michel Schulz, Phillip Bentley, Fritz Michallik, Melanie Fontana and Jonathan Strauch. To promote the single album, I.O.I's unit performed the song on two major South Korean musi