First air date: Aug 29, 2019
Episode duration: 01h 40m
Rating: (7.4) based on 12 votes
Status: In production Seasons: 2
Episodes: 20
Starring: Taeyeon, Lee Yong-jin, Hyolyn, Min Young, Yu Jeong
Genre: Reality
A musical battle between 6 trending girl group acts, in order to "determine the real number one" when all 6 release their songs at the same time.
