Andy Kindler, motocross demo with Travis Pastrana, Baby Gramps

Zach Braff, Jeff Brendenburg, The Roots

Snoop Dogg, Charlie Hill, OK Go

Julianne Moore, radio-show hosts Opie and Anthony

Al Franken, Todd Snider

Maria Sharapova, Martha Stewart, Justin Timberlake

Ashton Kutcher, Sam Hornish, Jr., TV on the Radio

Dwayne "The Rock" Johnson, Norm MacDonald

Anne Heche, Luke Ravenstahl, The Who

Johnny Knoxville, Rachael Ray

Dr. Phil McGraw, Willie Tyler and Lester, Sekou Bunch

Patrick Dempsey, Jay Johnson and Darwin, Kasabian

Marg Helgenberger, Ronn Lucas and Scorch, Diana Krall

Ted Turner, Jeff Dunham and Walter, Fergie

LeBron James, Todd Oliver and Irving, Ludacris

Ray Liotta, Elvis Costello & Tony Bennett, Billy Garcia

Billy Bob Thornton, Lily Capehart, Sean Lennon

Amanda Peet, Nigella Lawson, Bob Seger

Sir Richard Branson, Dane Cook, Monica

Nathan Lane, Jeff Caldwell

Pete Rose, Roy Wood Jr., Cecilia Mansilla

Andy Dick, Keith Olbermann, Brazilian Girls

Alec Baldwin, Vladae the Dog Wizard, Jerry Lee Lewis & Neil Young

Frank Caliendo, Rachael Harris, Xzibit, Phil Pfister

Amy Sedaris, Trey Anastasio

Robin Williams, J.P. Calderon, Sam Moore with Wynonna

Nicky Hilton, Bob Woodward, Joseph Arthur

Jon Stewart, Nick Lachey

Katie Couric, Brian Kiley, Alan Jackson

Diddy, Neil Patrick Harris

Tom Arnold, Brian Regan, the latest "Survivor: Cook Islands" castaway

Tina Fey, Mike Golic & Mike Greenberg, The Killers

Julia Louis-Dreyfus, Jay Thomas, John Legend

Tim Robbins, Gene Rurka, Russell Thompkins Jr. and The New Stylistics

Bill O'Reilly, Jeff Altman, Tilly and the Wall

Borat, Tiki Barber, Beck

Rachel Weisz, David Rakoff, Morningwood

Gary Sinise, Joanne Carson, Jim Norton

Rosie O'Donnell, Lady Sovereign

Martin Short, Kinky Friedman

Will Ferrell, Jack Hanna

Dustin Hoffman, Jamie Oliver, The Metropolitan Opera

Kiefer Sutherland, Jenna Fischer, Rocco DeLuca

Daniel Craig, documentary film subject Teri Horton, Elvis Costello, Rosanne Cash

Robin Williams, Rich Little, George Jones

Jack Black & Kyle Gass, Fred Travalena, Tenacious D

Ellen DeGeneres, Gordie Brown, +44

Christopher Guest, Frank Caliendo, The Game

Sen. John Edwards, Kevin Pollak, Will Arnett

Jerry Seinfeld, Dan Patrick

Hugh Jackman, Chris Elliott, Jimmie Johnson

Matthew Broderick, Lupe Fiasco & Jill Scott

Eugene Levy, John Mayer

Helen Hunt, DJ Shadow, Q-Tip and Lateef

Kate Winslet, Tom Waits

George Clooney, The Decemberists

Richard Simmons, Kate Walsh, Ciara

Jennifer Connelly, Tom Dreesen, Shiny Toy Guns

Danny DeVito, 16-year-old duct tape expert William Beacom, Silversun Pickups

Matt Damon, Barbara Walters

Howard Stern, Gwen Stefani

Kid Scientists, Regis Philbin, Robert Randolph

Will Smith, Evanescence

Clint Eastwood, Matthew Fox

Frank Caliendo as John Madden, Ben Stiller, Rodrigo & Gabriela

Beyonce, Marv Albert, The Dears

Renée Zellweger, holiday toy demonstration, Taking Back Sunday

Tom Brokaw, Cold War Kids

Cate Blanchett, Jay Thomas, Darlene Love

Martin Short, Donal Logue

Matt Lauer, Artie Lange, Augustana

Cedric the Entertainer, Wesley Autrey, Switchfoot

Donald Trump, Mary Lynn Rajskub

David Arquette, Jennifer Hudson

Penelope Cruz, Gary Mule Deer, Ben E. King

Peter O'Toole, Marc Maron

Julianne Moore, Madonna, The Hold Steady

Kristin Chenoweth, John Witherspoon, Josh Ritter

Amy Sedaris, Jason Randal, America with Ryan Adams & Ben Kweller

Paul Newman, Sebastian Bourdais, Diana Ross

Tina Fey, Terri and Bindi Irwin

Harry Shearer, Vera Farmiga, Mat Kearney

Dan Rather, Tricia Helfer, Andy Kindler

Kevin Spacey, Alicia Keys, Nellie McKay & The Brooklyn Philharmonic

Ricky Gervais, Forest Whitaker, The Shins

Frank Caliendo, Mandy Moore, Rosanne Cash

Bill Murray, LeBron James

David Spade, Alexandra Pelosi, Dustin Kensrue

Dr. Phil McGraw, Fall Out Boy

Randy Jackson, Harry Connick Jr., Regis

Chris Elliott, Kelly Ripa, John Mellencamp

Jack Hanna, Katherine Heigl, Patty Griffin

Rachael Ray, Frank Caliendo, The Fab Faux

Drew Barrymore, Rickie Lee Jones, Kevin Johnson with Clyde & Matilda

Peyton Manning, Dan Horn with Orson, The Cat Empire

Martha Stewart, Otto Petersen with George, Norah Jones

Sienna Miller, NAS, Jim Barber with Seville

Tracy Morgan, Gabrielle Union, Brad Cummings and Rex

Jim Carrey, Daytona 500 winner Kevin Harvick

Barbara Walters, David Neeleman, K-os

John Travolta, Eric Nerhus, a performance from the Broadway musical "Spring Awakening"

Billy Bob Thornton, Rashida Jones, Barenaked Ladies

Samuel L. Jackson, Jim Gaffigan

Jake Gyllenhaal, Brand New

Evangeline Lilly, Jeff MacGregor, bubble blowing guy Tom Noddy

Sen. John McCain, Robin Thicke

Bob Woodruff, John Mayer

Charles Grodin, Dan Naturman

Chris Rock, Sandra Oh, Amy Winehouse

Jeff Goldblum, Barbara McQueen

Richard Gere, Explorers Club chef Gene Rurka, Aqualung

Bernie Mac, Paula Abdul, Joss Stone

Adam Sandler, Don Cheadle, Danica Patrick, Todd Barry, Lucinda Williams

Jack Black, Lara Logan, beer launching refrigerator creator John Cornwell

Will Ferrell, Kings of Leon, Rachel Smith

Patricia Arquette, Paul Mooney, Macy Gray

Al Franken, Isla Fisher

Rosario Dawson, Bloc Party, Piedmont bird callers

Donald Trump, Jon Heder

Sen. Barack Obama, Halle Berry, Zach Johnson

David Duchovny, Ryan Howard, Andrew Bird

Alec Baldwin, Debbie Parkhurst and her dog Toby, LCD Soundsystem

Bruce Willis, Jason Randal

Bill Cosby, Angela Kinsey

Kelly Ripa, Simon Pegg

Craig Ferguson, Dave Della Terza, Avril Lavigne

Garry Shandling, Paul Teutul Sr. and Jr., Tokyo Police Club

Jessica Biel, Ira Glass, Regina Spektor

Brian Williams, Steven Wright, a Top Ten list presented by Sanjaya Malakar

David Hyde Pierce, Ivanka Trump, Corinne Bailey Rae

Nicolas Cage, Barry Sonnenfeld, The Fratellis

Steve Martin, Dave Cota and A.J. the parakeet, Derek Jeter

Frank Caliendo as President George W. Bush, Andy Dick, Jarvis Cocker

Kirsten Dunst, Rob Magnotti, Dinosaur Jr.

Tobey Maguire, John Byner, Modest Mouse

Drew Barrymore, Mike MacRae, Ben Kweller

Marcia Cross, Joe Piscopo, Tori Amos

Ray Romano, Reggie Reg, Dennis Haysbert

Regis Philbin, Darlene Love

Jane Fonda, Tom Ruprecht, Kelly Clarkson

Lindsay Lohan, Tom Dreesen, The Kooks

Dr. Phil McGraw, Jack Hanna

Charles Grodin, Jake Johannsen

Mike Myers, America Ferrera

Don Rickles, Michael Imperioli, Wilco, a Top Ten List presented by Masi Oka

Ricky Gervais, Mary Lynn Rajskub, Mavis Staples, a Top Ten List presented by Bob Barker

Kid Scientists, Luke Wilson, Rufus Wainwright, a Top Ten List presented by Homer Simpson

Teri Hatcher, Jonah Hill, Elvis Costello

Rudolph Giuliani, Mike West, Jesus & Mary Chain

Charles Barkley, Seth Rogen, Michael Martin Murphey

Stupid Pet Tricks, Rosie Perez, Dr. Dog

Al Gore, Jim Short

Kevin Spacey, Alexis Bledel

Matt Damon, Indianapolis 500 winner Dario Franchitti, Bright Eyes

Chevy Chase, Amanda Beard, Satellite Party

Nicole Richie, Artie Lange, Chrisette Michele

Amy Sedaris, Chuck "The Iceman" Liddell, Jordan Zevon

Ellen Barkin, Brian Regan

Denis Leary, Flight of the Conchords, Neal Seaver

Kyra Sedgwick, Sir Richard Branson, Maroon 5

Bear Grylls, Jeremy Piven, Elvis Perkins

John Cusack, Pink Martini, Turkey Gobbling Champions

Michael Moore, Bill Burr

Bruce Willis, Tony Parker, diving dogs

Amanda Peet, John Krasinski, Bryan Ferry

Claire Danes, Dan Patrick & Keith Olbermann, Ryan Adams & The Cardinals

Robin Williams, Julie Chen

Dennis Kucinich, Shia LaBeouf, Morrissey

Don Cheadle, Smashing Pumpkins, Venus Williams

Sienna Miller, Michael Cera, Interpol

Diddy, Emma Watson, Spoon

Paul Teutul Sr. and Jr., Vera Farmiga, Joe Matarese

Queen Latifah, Alan Zweibel, Smashing Pumpkins

Michelle Pfeiffer, Jonah Hill, Michel Lauziere

Adam Sandler, Mike Golic and Mike Greenberg, Mute Math

John Travolta, Paula Abdul, Teddy Thompson

Kevin James, Jose Andres, White Rabbits

Julia Stiles, Pete Jordan, Nick Griffin

Drew Carey, Nikki Blonsky, Grinderman

Paul Rudd, Tony Dungy, The National

Catherine Zeta-Jones, Bob Sarlatte, Porter Wagoner

Sharon Osbourne, Brian Kiley, Yeah Yeah Yeahs

Anne Hathaway, Jim Gaffigan, Buffalo Tom

Andy Samberg, Catherine Bell, The Bravery

Sen. Joe Biden, Seth Rogen, Gogol Bordello

Matt Damon, Jeff Altman, Angelique Kidjo

Jackie Chan, Chelsea Handler, Michael Buble

Glenn Close, Judd Apatow, Chris & Rich Robinson

Jeff Goldblum, Hayden Panettiere, New Pornographers

Samuel L. Jackson, Christiane Amanpour, Tom Russell

Richard Gere, Tom Dreesen, Velvet Revolver

Tina Fey, Venus Williams, Steve Earle

Tom Arnold, Kristin Gore, Jim McDonald

Susan Sarandon, Rick Reilly, Feist

Kevin Bacon, Kat Von D, T.I. with Wyclef

Ellen DeGeneres, Jeff Garlin, Against Me!

Sen. Hillary Rodham Clinton, Willie Nelson & Kenny Chesney

Amy Sedaris, Will Arnett