Name	Known for
Ryan Seacrest Self - Host Self - Host See fewer	American Idol (2002)
Simon Cowell Self - Judge Self - Judge See fewer	Scary Movie 3 (2003)
Ellen DeGeneres Self - Judge Self - Judge See fewer	The Ellen DeGeneres Show (2003)
Kara DioGuardi Self - Judge Self - Judge See fewer	Get Smart (2008)
Randy Jackson Self - Judge Self - Judge See fewer	The Truth About Cats & Dogs (1996)
Didi Benami Self Self See fewer	Pure Genius (2016)
Justin Bieber Self - Audience Member Self - Audience Member See fewer	Justin Bieber: Never Say Never (2011)
Crystal Bowersox Self Self See fewer	American Idol (2002)
Sean 'Diddy' Combs Self - Performer (as Diddy) Self - Performer (as Diddy) See fewer	Get Him to the Greek (2010)
Lee DeWyze Self Self See fewer	Lee DeWyze: Fight (2014)
Andrew Garcia Self Self See fewer	JustKiddingFilms (2007)
Casey James Self Self See fewer	American Idol (2002)
Aaron Kelly Self Self See fewer	American Idol (2002)
Michael Lynche Self Self See fewer	American Idol (2002)
Siobhan Magnus Self - Contestant Self - Contestant See fewer	The Eve (I) (2015)
Katie Stevens Self Self See fewer	Haunt (I) (2019)
Ruben Studdard Self - Performer Self - Performer See fewer	American Idol (2002)
Mark Thompson Announcer Announcer See fewer	The Day After Tomorrow (2004)
Tim Urban Self - Contestant Self - Contestant See fewer	Movie 43 (2013)
Will.i.am Self - Performer Self - Performer See fewer	X-Men Origins: Wolverine (2009)