Series
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.
Seasons
Cast
Taeyeon
Main Host
Lee Yong-jin
Self - Queen Manager
Hyolyn
Self - Contestant
Kim Min-young
Self - Contestant
Nam Yu-jeong
Self - Contestant
Hong Eun-ji
Self - Contestant
Lee Yu-na
Self - Contestant
Eunha
Self - Contestant
SinB
Self - Contestant
Umji
Self - Contestant
Seola
Self - Contestant
Bona
Self - Contestant
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