Host

Ryan Seacrest

Judge

Randy Jackson

Katy Perry

Self - Judge

Paula Abdul

Self - Judge

Simon Cowell

Luke Bryan

Lionel Richie

Self - Judge

Jennifer Lopez

Self - Judge

Keith Urban

Self - Judge

Harry Connick Jr.

Self - Judge

Kara DioGuardi

Self - Judge

Steven Tyler

Self - Judge / Self

Ellen DeGeneres

Self - Judge / Self / Self - Mentor

Mariah Carey

Self - Judge

Nicki Minaj

Self / Self - Guest Performer / Self - Contestant

Kimberley Locke

Self - Host

Brian Dunkleman

Self / Self - Contestant

Katie Stevens

Self - Contestant / Self

Todrick Hall

Self - Contestant / Self

Peter Frank

Self / Self - Contestant / Self - Musical Guest

Jennifer Hudson

Self / Self - Contestant

Chris Daughtry

Self / Self - Contestant

Jon Peter Lewis

Self - Guest Host / Self - Contestant / Self - Audience Member

Clay Aiken

Self - Contestant / Self - Guest

Tamyra Gray