Tracy Morgan, Matt Braunger

Jay Thomas, Mickey Rourke, Darlene Love

Dustin Hoffman, Todd Rundgren

Jerry Seinfeld, Leona Lewis

Will Smith, Of Montreal

Jennifer Aniston, Broken Social Scene

Tom Cruise, Fall Out Boy

Adam Sandler

Meryl Streep, Jeff Altman

Sen. John McCain, Bon Iver

Keanu Reeves, Paula Abdul, Loudon Wainwright III

Amy Adams, Michael Sheen, Jamey Johnson

Jennifer Connelly, Anderson Cooper, The Duke Spirit

Tom Arnold, Faith Hill

Denis Leary, John Mayer

Teri Hatcher, Ludacris

Reese Witherspoon, Harry Connick Jr.

Nicole Kidman, Simon Baker, Kanye West

James Franco, Bruce McCall, The Allstarz

Stephen Colbert, Kristen Stewart, Super Diamond

Katie Couric, Dev Patel, Mr. Brownstone

Carla Bruni Sarkozy, Jack Hanna, Cold Hard Cash

Emma Thompson, Michelle Felicetta, Purple Reign

Bill Cosby, Matt Braunger

Bruce Willis, Sia

Russell Brand, Charlie Haden

Don Rickles, Amy Brenneman, Alicia Keys

Ted Turner, Jamie Oliver, Taylor Swift

Natalie Portman, Artie Lange, Brad Paisley

Ben Stiller, Q-Tip

Tom Brokaw, Vera Farmiga

Paris Hilton, Elvis Costello, Jenny Lewis, a Top Ten List by Ricky Gervais

Marcia Cross, Alan Zweibel

Ashley Olsen, Paul Rudd, John Legend

Alec Baldwin, Paul Mooney, Ryan Adams

Regis Philbin, James Taylor

Bill O'Reilly, Lauren Conrad

Tina Fey, Frank Caliendo, Tim Montana

Sen. John McCain, Ne-Yo

Martin Short, Marv Albert

Josh Brolin, Amy Sedaris, Blues Traveler

Sarah Silverman, the Teutuls, Ra Ra Riot

Jeremy Piven, Elizabeth Banks, Lou Reed

Bill Murray, Beck

Dennis Quaid, Sarah Chalke, Buddy Guy

Debra Messing, John Carter, Tegan & Sara

Russell Crowe, Sarah Vowell, The Pretenders

Brian Williams, Tim Robbins

Calista Flockhart, Bill Hader, Lucinda Williams

Kate Walsh, Barry Sonnenfeld, Darius Rucker

Anne Hathaway, Josette Sheeran, The Virgins

Julia Louis-Dreyfus, Michael Cera, Pete Seeger

Lance Armstrong, Kristen Wiig, TV on the Radio

Paris Hilton, Usain Bolt, Morningwood

Keith Olbermann, Chandra Wilson, Delta Goodrem

Julianne Moore, Tom Dreesen & Tim Reid, Kings of Leon

Bill Clinton, Chris Rock

Meg Ryan, Ricky Gervais

Jessica Simpson, Jack Hanna

Sen. Barack Obama, LeBron James

Jada Pinkett Smith, Chris Russo, Michael Buble

Keira Knightley, Thomas L. Friedman

John Malkovich, Hayden Panettiere, Steve Earle

Robin Williams, Shannen Doherty, Duffy

Dr. Phil McGraw, Tilda Swinton, Tricky

Nicolas Cage, Anna Torv, Terrence Howard

Amy Sedaris, Kim Kardashian, Brian Regan

Brad Garrett, Blake Lively, Randy Houser

Kerri Walsh & Misty May-Treanor, Neil Patrick Harris, Nas

Bryan Clay, Don Cheadle, Little Anthony & The Imperials

Shawn Johnson, Tracy Morgan, Solange

Donald Trump, Dwayne Kennedy

Kiefer Sutherland, Rumer Willis, Phil Vassar

Kelly Ripa, Steve Coogan, Spiritualized

Seth Rogen, Fleet Foxes

Richard Simmons, Mary-Louise Parker

Luke Wilson, Mindy Kaling, Michael Lauziere

Pamela Anderson, James Franco, Atmosphere

Kevin Costner, Bob Sarlatte, Low vs. Diamond

Gillian Anderson, Simon Pegg, We Are Scientists

Nathan Lane, Larry "Bubbles" Brown, Randy Bachman

David Duchovny, Black Kids

John C. Reilly, Jane Mayer, Grizzly Bear

Amanda Peet, Jon Hamm, Augustana

Will Ferrell, Adam Savage & Jamie Hyneman

Rosie Perez, David Sedaris

Ricky Gervais, John Mellencamp

Maggie Gyllenhaal, Neil Young, The Hold Steady

Meryl Streep, Aaron Eckhart, Randy Travis

Pierce Brosnan, Bud Selig, Jason Mraz

Morgan Freeman, Kaley Cuoco, Wild Sweet Orange

Mary-Kate Olsen, Jim Gaffigan, Gavin DeGraw

Abigail Breslin, Barry Sonnenfeld, Tift Merritt

Charlize Theron, Richard Belzer, Mötley Crüe

Will Smith, Joe Buck

Denis Leary, The Baseball Project

Jason Bateman, Teri Garr, Keyshia Cole

Kevin Garnett & Ray Allen, Jane Krakowski, Martha Wainwright

Steve Carell, Lance Armstrong, Dr. John

Mike Myers, BMX star Kevin Robinson, Adele

Whoopi Goldberg , Spencer Pratt, Nick Griffin

Ben Kingsley, Artie Lange, Emmylou Harris

Zooey Deschanel, Scott McClellan, Jakob Dylan

Mark Wahlberg, Jeff Peckman, Alanis Morissette

Tom Brokaw, Elettra Wiedemann, Gnarls Barkley

Penelope Cruz, Danny Way, Randy Newman

Jenna Fischer, Jim Nantz, Gavin Rossdale

Julia Roberts, Al Green

Jack Black, Esperanza Spalding

Julianne Moore, Morgan Spurlock, a performance from the Broadway musical "South Pacific"

Adam Sandler, Scott Dixon, Donna Summer

Liv Tyler, Sue Johanson, Tommy Johnagin

Sarah Jessica Parker, Piedmont Bird Callers, Republic Tigers

Kristin Davis, Jimmy Buffett

Harrison Ford, Ali Lohan, Leona Lewis

Kevin Spacey, Sen. Jim Webb, Sara Bareilles

Teri Hatcher, Robert F. Kennedy Jr.

America Ferrera, Russell Brand, Terry Fator

Jack Hanna, Kid Rock

Regis Philbin, Laura Dern, Death Cab for Cutie

Stupid Pet Tricks, Shia LaBeouf, N.E.R.D.

Barbara Walters, Cobie Smulders, Penn & Teller

Paris Hilton, Steve Wyrick, Panic at the Disco

Emile Hirsch, Tom Dreesen, Dirk Arthur

Ashton Kutcher, Mac King, Steve Winwood

Jimmy Kimmel, Lance Burton, Jimmy Eat World

Patrick Dempsey, Isabella Rossellini, Nick Lowe

John Goodman, Bear Grylls, Robyn

Matthew Broderick, Heidi Montag, Josh Groban

Robert Downey Jr., Alicia Keys

Gwyneth Paltrow, Richard Lewis, The Roots with Chrisette Michele

Craig Ferguson, Ira Glass, The Black Crowes

Tina Fey, Brett Favre, Estelle

Danica Patrick, Russell Brand, Tokyo Police Club

Helen Hunt, Chris "Mad Dog" Russo, Kathleen Edwards

Billy Crystal, Maria Sharapova

Amy Poehler, Jason Segel, Jordan Zevon

Kelly Ripa, Dr. John P. Holdren, The Black Keys

Uma Thurman, Graham Rahal, The Gossip

Kelsey Grammer, Kristen Bell, Rogue Wave

Al Pacino, David Wright

Ellen Pompeo, Jay-Z, Mary J. Blige

Renee Zellweger, Gayle King, Paddy Casey

George Clooney, Norah Jones

Sen. John McCain, Cat Power

Helen Mirren, Jose Canseco

Brian Williams, Judy Greer, Langhorne Slim

Kate Bosworth, John Witherspoon, The Raveonettes

Demi Moore, Anthony Bourdain, Counting Crows

Brooke Shields, Seth Meyers, Gutter Twins

Al Franken, Lauren Conrad, The Cribs

Rainn Wilson, Mike Golic & Mike Greenberg, Bell X1

Jaime Pressly, Brian Regan

Kate Beckinsale, Graham Colton

Charlize Theron, Lewis Black, British Sea Power

Martha Stewart, Snoop Dogg

Jim Carrey, Paula Abdul

Woody Harrelson, Tommy Tiernan

Amy Adams, Jamie Oliver, Liam Finn

Kid Scientists, Natalie Portman, Kenna

Courteney Cox, Thomas Friedman, Chingy with Ludacris

Will Ferrell, Michael McDonald

Diddy, Al Lubel

Steve Martin, hand shadows performance with Raymond Crowe

Amy Sedaris, Erika Jensen, Foo Fighters

Randy Jackson, Saffron Burrows, Ray Davies

Dennis Quaid, Ryan Newman, Sharon Jones and the Dap-Kings

Charles Barkley, Bill Burr

Regis Philbin, Joseph Arthur

Martin Short, Amy Ryan

Evangeline Lilly, Marisa Miller, Brad Paisley

Kate Walsh, Jason Sudeikis, OK Go and Bonerama

Colin Farrell, Blake Lively, Lenny Kravitz

Kate Hudson, Jack Hanna

Eli Manning, Vince Vaughn, A Fine Frenzy

Matthew McConaughey, Gary Mule Deer, Sheryl Crow

Sen. Hillary Clinton, Sheryl Crow

Paris Hilton, Artie Lange, Vampire Weekend

Stupid Human Tricks, Eva Longoria Parker, Colbie Caillat

Dr. Phil McGraw, Lena Headey, Gary Allan

Bill Cosby, Lake Bell, The Matt Savage Trio

Jessica Alba, Julie Chen, The Whigs

Nathan Lane, Jake Johannsen

Julia Louis-Dreyfus, T.J. Miller, Super Furry Animals

Charles Grodin, New York Giant Lawrence Tynes, The Redwalls

Sen. John Edwards, Diablo Cody, Josh Ritter, David "Fathead" Newman

Sarah Michelle Gellar, Dan Patrick, Ringo Starr

Diane Keaton, Jim Gaffigan

Sylvester Stallone, the Teutul family, the Mars Volta

Michael Douglas, Katherine Heigl, Wyclef Jean

Denzel Washington, Don Rickles

Katie Holmes, Frank Caliendo, Maroon 5

Tracy Morgan, Kat Von D, Dropkick Murphys

Howard Stern, Ayo

Morgan Freeman, Tom Brokaw, Chuck Prophet

Lucy Liu, Alex Roy, MGMT

Tom Hanks, Gov. Mike Huckabee

Donald Trump, Shooter Jennings

Bill Maher, Ellen Page, the cast of Broadway's "Young Frankenstein"

Robin Williams, Lupe Fiasco