Jon Lovitz, Wilmer Valderrama, Jet

Gary Sinise, Seth Green, Tanya Streeter

David Spade, Sara Rue, Jim Gaffigan

Michael Caine, Jason Biggs, Joss Stone

Christina Ricci, Michael Rapaport, The Folksmen

Charlie Sheen, Scarlett Johansson, My Morning Jacket

Kelsey Grammer, Craig Bierko, Greg Giraldo

Kevin James, Teri Polo, Ken Burns

Whoopi Goldberg, Rosario Dawson, Eastmountainsouth

Diane Lane, Wanda Sykes, Jonny Lang

The Rock, Isaac Mizrahi, Robert Randolph & The Family Band

Alec Baldwin, Vanessa Marcil, Rancid

Val Kilmer, Carmen Electra, Todd Barry

Jack Black, Christopher Walken, Staind

Lisa Kudrow, Jeremy Piven, Grandaddy

Kevin Bacon, Vivica A. Fox, The Del McCoury Band

Lucy Liu, Michael Moore, Gov't Mule

Uma Thurman, Josh Lucas, North Mississippi All-stars

Gwyneth Paltrow, Philip Seymour Hoffman, Howie Day

Tim Robbins, Natasha Henstridge, Kaki King

David Arquette, Gina Gershon, Béla Fleck and the Flecktones

Norm MacDonald, Laura Prepon, Triumph the Insult Comic Dog

Al Franken, Courtney Thorne-Smith, The Thrills

Quentin Tarantino, Molly Sims, Chuck Palahniuk

James Caan, David Cross, Greg Behrendt

Patrick Stewart, Regina Hall, The Strokes

Laurence Fishburne, Steven R. Schirripa, The Polyphonic Spree

Will Ferrell, Chloë Sevigny, Sarah Vowell

Darrell Hammond, Shannen Doherty, Joshua Bell

Ice-T, Jenna Elfman, The Strokes

Brendan Frasier, Marg Helgenberger, Ron Isley & Burt Bacharach

Dolly Parton, Steve Irwin

Russell Crowe, Alicia Silverstone, Andrew W.K.

William H. Macy, Heidi Klum, The Strokes

Elvis Costello, Eliza Dushku

Billy Bob Thornton, Nick Lachey, Rob Krueger

Lauren Graham, Steve Harvey, Dashboard Confessional

Ron Howard, John Tesh, The Strokes

Zach Braff, Billy Connolly, The Brian Setzer Orchestra

Bernie Mac, Ben Chaplin, Thursday

Brian Williams, Maggie Gyllenhaal, Jim Gaffigan

Jude Law, Maggie Gyllenhaal, Michelle Branch

Greg Kinnear, Bob Odenkirk, Tom Shales

Matt Damon, Kevin Pollack, Randy Newman

Kelly Ripa, Emma Bolger, Tony Bennett

Elijah Wood, Estella Warren, Liz Phair

Jennifer Connelly, Lewis Black, Sam Goldstein

Natalie Portman, Bill O'Reilly, Patty Loveless

Julia Stiles, Marc Maron. Mitch Hedberg

Ian McKellen, Petra Nemcova, The Stills

Tom Brokaw, Gary Sheffield, John Mayer with Buddy Guy and Double Trouble

Jarod Miller, Amy Sedaris, Moby

Ethan Hawke, George Wendt, Natalie MacMaster

Tyra Banks, Andy Serkis, Los Lonely Boys

Benicio Del Toro, Richard Lewis, Maroon 5

Ben Stiller, Sarah Ferguson, Rich Hall

Nathan Lane, Susie Essman, The Bouncing Souls

Dave Chappelle, Jerry Orbach, The Candy Butchers

Donald Trump, Jeff Garlin, Brian Kiley

Ashton Kutcher, Kristin Kreuk, Rickie Lee Jones

Topher Grace, Jack Osbourne, Jim McMullan

Al Roker, Mischa Barton, Mindy Smith

Matt Lauer, Tom Cavanagh, Paul Teutul, Paul Teutul Jr., & Mikey Teutul

Megan Mullally, Harry Connick Jr.

Drew Barrymore, Paul Rudd, The Walkmen

Mike Myers, Ron James (in Toronto)

Michael J. Fox, Ken Capling, Nickelback (in Toronto)

Adam Sandler, Stompin' Tom Connors (in Toronto)

Jim Carrey, Eric McCormack, Barenaked Ladies (in Toronto)

Meg Ryan, "Queer Eye" Guys, The Shins

Kristen Davis, Omar Epps, The Holmes Brothers

James Spader, Ruben Studdard, Kenny Chesney

Walter Cronkite, Fred Armisen, Ben Harper

Damon Wayans, Paulie Litt, Al Green

Andy Garcia, Brittany Daniel, Brini Maxwell

Samuel L. Jackson, James Carville, Van Hunt

Barbara Walters, Grant Rosenmeyer, Grant Lee Philips

Andy Dick, Clyde Peeling, Wheat

Snoop Dogg, Paul Bettany, Mr. Geography

Michael Imperioli, Kenan Thompson, Tom Jones

Ben Stiller, Owen Wilson, Meredith Vieira, Cee-lo

Liv Tyler, Juliette Lewis, Norah Jones

Jeff Goldblum, Omarosa Stallworth, Sarah McLachlan

Elijah Wood, Rachel Dratch, B. J. Novak

Frankie Muniz, Big Show, Ollabelle

Edie Falco, Mayor Jason West, The Allman Brothers Band

Carson Daly, Portia de Rossi, James Lipton

Kate Winslet, Jamie Lynn DiScala, The Living End

Ethan Hawke, Neil Young, Omid Djalili

Bob Costas, Brian Posehn, Toby Lightman

Minnie Driver, Chris Klein, Usher

Al Frankin, Vivica A. Fox, Scotty Nguyen

The Rock, Colin Quinn, The Sleepy Jackson

Johnny Knoxville, Elisha Cuthbert, The Distillers

Cedric the Entertainer, Jason Bateman, Yoshi Amao

Tim Robbins, Larry King, Lambchop

Uma Thurman, Jon Favreau, Sugarcult

Quentin Tarantino, Rhona Mitra, Ben Kweller

Chris Rock, Shannon Elizabeth, Joe Buck

David Duchovny, Kwame Jackson, Jim Gaffigan

Rebecca Romijn-Stamos, Patton Oswalt, Shinedown

Jennifer Esposito, Mark McKinney, David Feldman

Tina Fey, Jamie Foxx, John Mayer

Lindsay Lohan, Randy Jackson, Patti Smith

Ray Liotta, Rachel Bilson, Carly Simon

Andy Richter, Mila Kunis, Georges Brossard

Brad Pitt, Janet Jackson

Lauren Graham, Paula Abdul, Old Crow Medicine Show

Eric Bana, Amy Poehler, Sondre Lerche

Kelsey Grammer, Mariska Hargitay, Lewis Black

Jimmy Fallon, Vince Curatola, Jamie Cullum

Peter Gallagher, Pun Yin, Rachael Yamagata

Laura Prepon, Robert Reich, Yellowcard

Al Roker, Harland Williams, Manny Yarbrough

Tom Selleck, Macaulay Culkin, Dave Attell

Darrell Hammond, Benjamin McKenzie, Switchfoot

Tom Arnold, Daniel Radcliffe, John Pizzarelli

Brian Williams, Kevin Hart, Andrew W. K.

Senator John McCain, George Lopez, Tom Papa

Mandy Moore, Susie Essman, Ambulance, Ltd.

Jay Mohr, Richard Schiff, Simple Kid

Kristin Davis, Steve Coogan, Mama Gena

Jennifer Love Hewitt, Steve Irwin, Indigo Girls

Ice-T, Jeremy Suarez, Demetri Martin

Jackie Chan, Tim Russert, Franz Ferdinand

Matthew Broderick, Steven Wright, Patti Scialfa

Tom Hanks, Sam Moore With Carla Thomas

Gisele Bundchen, Jesse James, Auf Der Maur

Ashley Judd, Jeff Goldblum, Alanis Morissette

James Garner, Busy Phillips, Air Guitar Champion, Miri Park

Marlon Wayans, Nicole Richie, Heart

Michael Moore, Patton Oswalt, Ozomatli

Will Ferrell, Beth Littleford, Jesse Malin

Christina Applegate, Marc Maron, Sonic Youth

John McEnroe, Sting

Paul Rudd, Lars Ulrich, Jim Gaffigan

Caroline Rhea, Jeff Garlin, Burning Brides

Queen Latifah, Ali G, The Roots

Alan Cumming, Vivica A. Fox, Ricky Fante

Rev. Al Sharpton, Randy Constan

Julianna Margulies, Kevin Pollak, Greg Fitzsimmons

Benjamin Bratt, Isaac Mizrahi, Modest Mouse

Halle Berry, Christopher Meloni, Erinn Smart

Carson Daly, Laird Hamilton, D12

Natalie Portman, Mark Consuelos, Los Lobos

Jamie Foxx, Josie Maran, Beenie Man

Brittany Murphy, John Cho, Louis C. K.

Jada Pinkett Smith, Aries Spears, Sahara Hotnights

Seth Green, Anne Hathaway, NOFX

Clyde Peeling, Dax Shepard, Mutual Admiration Society

Compilation Show

Darrell Hammond, Blanchard Ryan, They Might Be Giants