Peak Time

Lee Seung-gi

as

Self - MC

Cho Kyu-hyun

as

Self - Judge

Tiffany Young

as

Self - Judge

Jay Park

as

Self - Judge

Lee Gi-kwang

as

Self - Judge

Kim Sung-kyu

as

Self - Judge

Song Min-ho

as

Self - Judge

Shim Jae-won

as

Self - Judge

Ryan Jhun

as

Self - Judge

Moonbyul

as

Self - Judge