Sharon Stone, Tyler James Williams, Sherri Shepherd

Jeff Gordon, The Very Real Women of Dove

Alicia Keys, Ray Romano

Hilary Duff, Debra Messing

George Lopez, Cast of ‘The OC’

Kanye West, Jeff Foxworthy

David Spade, Tommy Lee

Lauren Graham, Jeffrey Tambor

Melanie Griffith, Chris O’Donnell

Gwenyth Paltrow, Leah Remini

Charlie Sheen, Cynthia Nixon

Felicity Huffman, Megan Mullally

Donald Trump, Paul Reiser, Peter Falk

Johnny Knoxville, Carla Gugino

James Denton, Rachel Weisz

Nicollette Sheridan, Chi McBride

Jodie Foster, Nick Cannon

Alec Baldwin, Alyson Hannigan

Jennifer Garner, Michael Rapaport

Fran Drescher, Jerry O’Connell

Jennifer Love Hewitt, Jared Padalecki

Josh Duhamel, Joely Fisher

Jessica Alba, Noah Wyle

David Duchovny, Constance Marie

Cameron Diaz, Paul Walker

Matt LeBlanc, Vanessa Marcell

Matthew McConaughey, Wynonna Judd

Denise Richards, Sherri Shepherd

Bonnie Hunt, Naveen Andrews

Kevin Bacon, Sara Rue

Hilary Clinton, Kirsten Dunst

Jimmy Kimmel, Amy Brenneman

Meryl Streep, Jason Lee

Charlize Theron, Jeff Daniels

Dakota Fanning, Rod Stewart

Barbra Steisand, Ashlee Simpson

Stevie Wonder, Susan Sarandon

Benjamin Bratt, Elisabeth Shure

Antonio Banderas, Kathryn Morris

Catherine Zeta-Jones, Sherri Shepherd, Dylan Walsh

Season 3 Halloween Show: Jane Kaczmarek, Emily Procter

Julie Bowen, Zach Braff

Jimmy Smits, Steve Zahn

Tour of Warner Bros. Studio

John Stamos, Ricky Martin

Neil Patrick Harris, Pamela Anderson

John Cusack, Jaime Pressly

Chad Michael Murray and Martha Stewart

Jake Gyllenhaal/Carmen Electra

Jennifer Aniston/Kenny Chesney/Hugh Laurie

Paul McCartney

Geena Davis, Ryan Reynolds

Reese Witherspoon, Terrence Howard, Hazel Smith

Robert Downey Jr., Maura Tierney, Suni Black

Mariah Carey, Evangeline Lilly, Marc Yu

Usher, Cyndi Lauper, Rosie Perez, the cast of "Rent"

Kim Cattrall, Bon Jovi, the Radio City Music Hall Rockettes

Matt Lauer, Tina Fey, Rachel Dratch, Amy Poehler

Gwyneth Paltrow, Leah Remini, Marc Cherry

Queen Latifah, Billy Joel

Patricia Heaton, Neil Diamond, Michael Sessions

Dennis Quaid

Jay Leno

Anthony LaPaglia, Ty Pennington

Harry Connick Jr., Wolfgang Puck

Courteney Cox, David Arquette, Daryl Hannah, Martina McBride

Ted Danson, Shakira, Aisha Tyler

Marg Helgenberger, Mekhi Phifer

Amanda Peet, Treat Williams, Vera Wang

Martin Sheen, Molly Sims

Diane Keaton, Colin Hanks

Jim Carrey, Bo Bice

Lindsay Lohan, Alicia Keys

Sarah Jessica Parker, Anthony Hamilton

The cast of "The Producers"

Téa Leoni/Enrique Murciano/Ginuwine

Tom Selleck/Kristin Chenoweth

Melina Kanakaredes/Anthony Anderson/Chris Brown

Steve Carell/Betty White/John Mayer Trio

Kanye West/Doug Savant

Patricia Arquette/Mekhi Phifer

Michael Chiklis/Rick Springfield

Dominic Monaghan/Matt Dillion

Billy Crystal

Greg Kinnear/Jean Smart

Kanye West/Anne Hathaway

Paula Abdul

Matthew Fox

Pierce Brosnan/Q'Orianka Kilcher/Heidi Klum

Constance Marie/Geoffrey Gallante

Colin Firth/Jenna Elfman

Alicia Silverstone/Shemar Moore

Martin Lawrence/Fred Savage/Sarah McLachlan

Mary J. Blige/Sherri Shepherd

Emma Thompson/Blair Underwood/Heather Headley

Jon Cryer/Jennifer Esposito

Jane Kaczmarek/Christopher Meloni

Jason Mraz/Sean Hayes

Teri Hatcher/Paul Bettany

Leah Remini/Neil Patrick Harris

Barry Manilow/30th High School Reunion

Queen Latifah/Bonnie Raitt

Nelly/Madonna

Harrison Ford/Faith Hill/Travis Stork

Heath Ledger/Sheryl Crow/Sherri Shepherd

Lauren Graham/Jeff Probst

Jason Biggs/Minnie Driver/Drew Lachey

Tyra Banks/Betty White

Keira Knightley/Paul Reiser

Alyson Hannigan/Penny Marshall/Rihanna and the Nike Dancers.

Simon Cowell/James Blunt

Samuel L. Jackson/Famke Janssen/Natasha Bedingfield

Dolly Parton/Stacy Keibler/John Krasinski

Marcia Cross/Rosie Perez

Steve Harvey/Hilary Duff

Dennis Quaid/Cowboy Mouth

Eddie Cibrian/Felicity Huffman

Carl Reiner/Rosanne Cash/Jennifer Love Hewitt/Sasha Cohen

Apolo Anton Ohno/Cast of

James Spader/Jennifer Finnigan

Martin Short/Emilie De Ravin/Three 6 Mafia

Robert Downey Jr./KT Tunstall/Amanda Bynes.

Tim Allen/Floetry

Donald Trump/Train/Michelle Rodriguez

John Edward/Julia Louis-Dreyfus

Freddie Prinze Jr./Chris Noth/Jammx Kids

Vin Diesel/Howie Mandel

George Lopez/Morgan Freeman/Natasha Bedingfield

Liza Minnelli/Orlando Jones

Brendan Fraser/Shakira/Sherri Shepherd

John Goodman/Tim McGraw/Kevin Covais

Kelsey Grammer/LL Cool J

Sharon Stone/DMC/Whoopi Goldberg

Jennifer Aniston/Scott Foley

Anjelica Huston/Justin Chambers

Rebecca Romijn/Stephen Collins/Les Stroud

David Spade/Catherine Keener/NE-YO

Ray Romano/Jeff Corwin/Kelly Monaco

Charlie Sheen/Pink

Jamie Foxx/Jeff Bridges/Bucky Covington

Randy Jackson/Rhea Perlman/Toby Keith

Wanda Sykes/Poppy Montgomery

Kiefer Sutherland/Maya Rudolph/Tanya Streeter

Rob Lowe/Kate Walsh/Teddy Geiger

Elton John/Kim Raver/Ace Young

Sally Field/Kenny Rogers/Jodelle Ferland

Roseanne/David Boreanaz

Robin Williams / Daniel Powter / Wentworth Miller

Michael Douglas/Jenna Fischer

Paris Hilton/Kellie Pickler/David Frei

Geena Davis/Nigel Lythgoe

Ryan Seacrest/Merv Griffin

Candice Bergen/Mekhi Phifer

Ellen Pompeo/Graig Ferguson

Luke Wilson/Shemar Moore/Paris Bennett

Samuel L. Jackson/Famke Janssen/Natasha Bedingfield

Lindsay Lohan/Chris Isaak/Ty Pennington

Cast of The West Wing

Tom Cruise/Jane Kaczmarek *Mother's Day*

Kanye West/Howie Mandel *Ellen in the Park*

Nick Lachey/Ron Howard/Chris Daughtry

Julie Andrews *Ellen Comes Home*

Diane Keaton/Paul Simon/Sherri Shepherd *500th Show*

Teri Hatcher/Harold Perrineau

Evangeline Lilly/Jamie Kennedy *Farewell to Tony*

Nicollette Sheridan/Michael Bolton/Omar Epps

Jack Black/Kristin Chenoweth

Randy Jackson/Paul Simon/Bill Clinton

Hugh Jackman/Flavor Flav

Vince Vaughn/ Taylor Hicks {Season Finale}