as Self - Mentor

as

as Self

as Guest

as

as Self

as

as Team F.T. Island Producer

as

as

as

as

as 출연

as Vocal Trainer

as Cha Yool

as

as Lee Hong-gi

as Vocal trainer

as Self

as Self

as Jeo Pal-kye / PK

as

as

as Himself

as Self

as

as Seok-gu

as Lee Min Ki

as Choi Kang Ju

as

as

as Choong Ui

as

as Self

as

as Yoo Ji-Ho

as

as Self

as Jeremy

as Self

as Kim Ji-hoon

as

as himself

as himself