On screen
Cast
204 credited performers
Ryan Seacrest
Self - Host
Randy Jackson
Self
Simon Cowell
Self
Paula Abdul
Self
Clay Aiken
Self - Performer
David Boreanaz
Self
Flex Alexander
Celebrity Courtyard Correspondent
Anthony Anderson
Self
Dwayne Johnson
Self
Denzel Washington
Self
Kelly Rowan
Self
Tamyra Gray
Self
Lenny Kravitz
Self
Stephen Collins
Self
Lindsay Lohan
Self
Elisha Cuthbert
Self
Justin Guarini
Celebrity Courtyard Correspondent
Jasmine Trias
Self - American Idol contestant
Michelle Trachtenberg
Self
Steven Cojocaru
Character not listed
Britney Spears
Self - Performer
Tom Arnold
Character not listed
Carmen Electra
Self
John Stevens
Self - American Idol contestant
Antonio Sabàto Jr.
Self
Catherine Bell
Self
Michael Bublé
Self - Performer
Andrew Lawrence
Celebrity Courtyard Correspondent
Kylie Minogue
Self
Kathie Lee Gifford
Self
Baby Bash
Self - Performer
Hilary Duff
Self
Bryan Cranston
Self
Sasha Alexander
Self
Omarion
Self
Marques Houston
Self
Kimberly Caldwell
Celebrity Courtyard Correspondent
Kristen Stewart
Self
Kathy Najimy
Self
Breckin Meyer
Self
Seal
Self - Performer
Daisy Fuentes
Celebrity Courtyard Correspondent
Kelly Clarkson
Self - Performer
Rob Schneider
Self
LisaRaye McCoy
Self
Jim Verraros
Celebrity Courtyard Correspondent
Arsenio Hall
Self
Keiko Agena
Celebrity Courtyard Correspondent
Jennifer Love Hewitt
Self
Lucy Lawless
Self
Carmen Rasmusen
Celebrity Courtyard Correspondent
Eliza Dushku
Self
Pat Monahan
Self - Train (singer)
Johnny Colt
Self - Train (bass)
Jimmy Stafford
Self - Train (guitar)
Brandon Bush
Self - Train (piano)
Scott Underwood
Self - Train (drums)
JC Chasez
Self - Performer
Sela Ward
Self
Jesse Bradford
Self
Diego Luna
Self
Sharon Osbourne
Self
Samaire Armstrong
Self
Oprah Winfrey
Self
Johnny Depp
Self
Ben Stiller
Self
Jennifer Garner
Self
Jolene Blalock
Self
Taylor Hanson
Self - (Hanson) Performer
Zac Hanson
Self - (Hanson) Performer
Isaac Hanson
Self - (Hanson) Performer
Roma Downey
Self
Sean Patrick Thomas
Self
Trista Sutter
Self - The Bachelorette
Ryan Sutter
Self - The Bachelorette
Jami Gertz
Self
Mark Addy
Self
Chuck Woolery
Self
Esai Morales
Self
Debbie Gibson
Celebrity Courtyard Correspondent
Molly Shannon
Self
Mekhi Phifer
Self
Gisele Bündchen
Self
Caroline Dhavernas
Celebrity Courtyard Correspondent
Michael Chiklis
Self
Ving Rhames
Self
Melana Scantlin
Celebrity Courtyard Correspondent
Jon Foreman
Self - Switchfoot (singer)
Tim Foreman
Self - Switchfoot (bass)
Drew Shirley
Self - Switchfoot (guitar)
Jerome Fontamillas
Self - Switchfoot (guitar)
Chad Butler
Self - Switchfoot (drums)
Rebecca Gayheart
Self
Regis Philbin
Self
Leah LaBelle
Self - American Idol Contestant
Jackie Thomas
Self
Tyra Banks
Self
Murphy Lee
Self - Performer
Jermaine Dupri
Self - Performer
Cindy Herron
Self - (En Vogue) Performer
Terry Ellis
Self - (En Vogue) Performer
Maxine Jones
Self - (En Vogue) Performer
Nelly Furtado
Self
Janice Dickinson
Self
Bonnie Hunt
Self
Sen Dog
Cypress Hill - Performer
B-Real
Cypress Hill - Performer
DJ Muggs
Cypress Hill - Performer
Eric Bobo
Cypress Hill - Performer
Linda Cardellini
Self
David Arquette
Self
Jamie-Lynn Sigler
Self
Ron Perlman
Self
Jerry Springer
Self
Chris Klein
Self
Yoanna House
Self
Adam Gontier
Self
Neil Sanderson
Self
Brad Walst
Self
Barry Stock
Self
Shannen Doherty
Self
Raquel Castro
Self
Natasha Henstridge
Self
Janet Jackson
Self
Tori Amos
Self - Performer
Rachel Hunter
Self
Susie Castillo
Self
Solange
Self
Shad Moss
Self
Dan Cortese
Self
Ashley Scott
Self
Rick Springfield
Self - Performer
Jerry O'Connell
Self
Dolly Parton
Self
Anne Hathaway
Self
Tracy Morgan
Self
Michael Madsen
Self
Melissa Joan Hart
Self
Robert Schwartzman
Self
Louie Stephens
Self
Taylor Locke
Self
Matthew Winter
Self
Ned Brower
Self
Kim Delaney
Self
Cedric the Entertainer
Self
Vanessa Williams
Self
Daryl Hannah
Self
Kevin Bacon
Self
Michael Bacon
Self
Quentin Tarantino
Self
Lisa Rinna
Self
Kevin Pollak
Self
Jason Priestley
Self
Barry Manilow
Self - Performer
Nia Vardalos
Self
Usher
Self
Gabrielle Union
Self
Smokey Robinson
Self - Performer
Enrique Iglesias
Self - Performer
Reba McEntire
Self
Adam Sandler
Self
Nicole Richie
Self
LeAnn Rimes
Self
John Mayer
Self - Performer
Donald Trump
Self
Missy Elliott
Self
Sting
Self
Kiefer Sutherland
Self
Frankie Muniz
Self
Ruben Studdard
Self - Performer
Jason Bateman
Self
Josh Duhamel
Self
Topher Grace
Self
Sheryl Crow
Self
Mike O'Malley
Self
Liza Snyder
Self
Jean Louisa Kelly
Self
Jon Cryer
Self
DJ Spinderella
Self
Michelle Branch
Self
Bobb'e J. Thompson
Self
Jeff Probst
Self
Aisha Tyler
Self
Jack Osbourne
Self
Doris Roberts
Self
Sarah McLachlan
Self
Bob Guiney
Self
Joe Rogan
Self
Doug Stanhope
Self
Kimberley Locke
Self
Greg Kinnear
Self
Dakota Fanning
Self
Beau Bridges
Self
Mischa Barton
Self - The O.C.
Adam Brody
Self - The O.C.
Rachel Bilson
Self - The O.C.
Peter Gallagher
Self - The O.C.
Alan Dale
Self - The O.C.
Melinda Clarke
Self - The O.C.
Navi Rawat
Self - The O.C.
Amanda Righetti
Self - The O.C.
Alicia Keys
Self
Terry Dubrow
Self
Jeff Gordon
Self