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)
Paula Abdul Self - Judge Self - Judge See fewer	Robots (2005)
Randy Jackson Self - Judge Self - Judge See fewer	The Truth About Cats & Dogs (1996)
African Children's Choir Self Self See fewer	Blood Diamond (2006)
Antonella Barba Self (as Amanda and Antonella) Self (as Amanda and Antonella) See fewer	All About the Money (2017)
Tony Bennett Self Self See fewer	Muppets Most Wanted (2014)
Edward Boddington Self Self See fewer	American Idol (2002)
Kenneth Briggs Self (as Jonathan and Kenneth) Self (as Jonathan and Kenneth) See fewer	American Idol (2002)
Sandi Chavez Self (archive footage) Self (archive footage) See fewer
Kelly Clarkson Self Self See fewer	The Kelly Clarkson Show (2019)
Amanda Coluccio Self (as Amanda and Antonella) Self (as Amanda and Antonella) See fewer	American Idol (2002)
Clive Davis Self Self See fewer	Deadpool 2 (2018)
Melinda Doolittle Self Self See fewer	Billy: The Early Years (2008)
Stephanie Edwards Self Self See fewer	The Ellen DeGeneres Show (2003)
Ashley Ferl Self (archive footage) Self (archive footage) See fewer	40 Greatest Reality TV Moments 2 (2007)
Joely Fisher Self - Audience Self - Audience See fewer	The Mask (1994)
Margaret Fowler Self Self See fewer	American Idol (2002)
Jeff Foxworthy Self - Audience Self - Audience See fewer	Are You Smarter Than a 5th Grader? (I) (2007)
Doug E. Fresh Self Self See fewer	Face/Off (1997)
Isadora Furman Self (archive footage) Self (archive footage) See fewer
Gina Glocksen Self Self See fewer	American Idol Extra (2006)
Green Day Themselves Themselves See fewer	Shoot 'Em Up (2007)
David Hasselhoff Self - Audience Self - Audience See fewer	Baywatch (1989)
Teri Hatcher Self - Audience Self - Audience See fewer	Tomorrow Never Dies (1997)
Taylor Hicks Self Self See fewer	American Idol (2002)
Jennifer Hudson Self - Audience Member Self - Audience Member See fewer	Dreamgirls (2006)
Jonathan Jayne Self (as Jonathan and Kenneth) Self (as Jonathan and Kenneth) See fewer	American Idol (2002)
LaKisha Jones Self Self See fewer	Heroes Among Us: The 2009 Hero Awards (2009)
Gladys Knight Self Self See fewer	Hollywood Homicide (2003)
Blake Lewis Self Self See fewer	Blake Lewis Is Shitting in My Bathroom (2009)
Nigel Lythgoe Self Self See fewer	So You Think You Can Dance (2005)
Sanjaya Malakar Self Self See fewer	American Idol (2002)
Martik Manoukian Self (archive footage) (as X-Centric) Self (archive footage) (as X-Centric) See fewer	Sayeneshin (2015)
Constantine Maroulis Self - Audience Self - Audience See fewer	Rock of Ages (2012)
Bette Midler Self Self See fewer	Beaches (1988)
Rickey Minor Self - Band Leader Self - Band Leader See fewer	Poseidon (2006)
Joe Perry Self Self See fewer	Armageddon (1998)
Chris Richardson Self Self See fewer	November Rule (2015)
Smokey Robinson Self Self See fewer	Big Time (1977)
Brandon Rogers Self Self See fewer	Coming 2 America (2021)
Haley Scarnato Self Self See fewer	The Ellen DeGeneres Show (2003)
Chris Sligh Self Self See fewer	October Baby (2011)
Jordin Sparks Self - Winner Self - Winner See fewer	Sparkle (I) (2012)
Jerry Springer Self - Audience Self - Audience See fewer	Domino (2005)
Phil Stacey Self Self See fewer	CMT Insider (2004)
Sholandric Stallworth Self Self See fewer	American Idol (2002)
Gwen Stefani Self - Performer Self - Performer See fewer	Trolls (2016)
Ruben Studdard Self Self See fewer	American Idol (2002)
Mark Thompson Announcer Announcer See fewer	The Day After Tomorrow (2004)
Carrie Underwood Self Self See fewer	Soul Surfer (2011)
Nicholas Zitzman Self (archive footage) Self (archive footage) See fewer