Host

Ryan Seacrest

Judge

Simon Cowell

Self - Judge

Randy Jackson

Self - Judge / Self

Ellen DeGeneres

Judge

Kara DioGuardi

Victoria Beckham

Self - Judge

Paula Abdul

Contestant

Didi Benami

Self - Judge

Jennifer Lopez

Mary J. Blige

Kristin Chenoweth

Self - Judge

Keith Urban

Contestant

Crystal Bowersox

Joe Jonas

Contestant

Lacey Brown

Self - Judge

Harry Connick Jr.

Contestant

Michelle Delamor

Neil Patrick Harris

Avril Lavigne

Self - Judge

Steven Tyler

Contestant

Katelyn Epperly

Katy Perry

Contestant

Siobhan Magnus

Self - Judge / Self / Self - Mentor

Mariah Carey

Contestant

Paige Miles

Shania Twain

Contestant

Ashley Rodriguez

Self - Judge

Nicki Minaj

Self / Self - Guest Performer / Self - Contestant

Kimberley Locke

Contestant

Lilly Scott

Self - Host

Brian Dunkleman

Contestant

Katie Stevens

Contestant

Haeley Vaughn

Self - Contestant / Self

Todrick Hall

Contestant

Janell Wheeler

Contestant

Lee DeWyze

Self - Contestant / Self

Peter Frank

Self / Self - Contestant / Self - Musical Guest

Jennifer Hudson

Contestant

Andrew Garcia

Self / Self - Contestant

Chris Daughtry

Contestant

Tyler Grady

Self / Self - Contestant

Jon Peter Lewis

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

Clay Aiken

Contestant

Casey James

Self - Contestant / Self - Guest

Tamyra Gray

Contestant

Aaron Kelly

Contestant

Alex Lambert

Contestant

Michael Lynche

Contestant

Joe Muñoz

Contestant

John Park

Contestant

Jermaine Sellers

Contestant

Tim Urban