Late Show with David Letterman

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Jennifer Aniston, 50 Cent

Matthew Broderick, Teri Garr

Kelly Ripa, Hilary Duff

Steve Martin, the Teutul family from "American Chopper"

Ted Koppel, Jim Gaffigan, Trey Anastasio

Kid scientists, John Cusack

Joaquin Phoenix, Trisha Yearwood

Ellen DeGeneres, Brad Paisley

Howard Stern, Pharrell Williams

Sen. John McCain, Carla Gugino

George Clooney, Ashlee Simpson

Dennis Quaid, Donovan McNabb

Stupid Pet Tricks, Claire Danes, Big Boi

Megan Mullally, John Mayer Trio

John Malkovich, NASCAR Nextel Cup winner, Jim Gaffigan

Stupid Human Tricks, Amanda Peet

Regis Philbin, Colin Hanks

Charlize Theron, Maureen Dowd

Oprah Winfrey, Bonnie Raitt

Rodeo champion Billy Etbauer

Jack Black, Reggie Bush, Sinead O'Connor

Sarah Jessica Parker, John Witherspoon

Stephen Colbert, Aqualung

Alec Baldwin, Shakira

Dr. Phil McGraw, Bill Scheft

Jim Carrey, We Are Scientists

Bonnie Hunt, Stephen A. Smith

Nathan Lane, Tom Dreesen

Jamie Foxx, Andy Kindler

Rosie Perez, Jay Thomas, Darlene Love

Heather Graham, Fall Out Boy

Bill O'Reilly, Eric Bana

Pierce Brosnan, Marv Albert

Felicity Huffman, David Rakoff, Common

Amy Sedaris, Dennis Regan, the Temptations

Albert Brooks, Kristin Cavallari

Scarlett Johannsen, Tiki Barber, Imogen Heap

Queen Latifah, Bob Sarlatte

Kiefer Sutherland, Alicia Keys, Andy Samberg

Tom Cavanagh, Jake Johannsen

Martin Lawrence, Kari Byron, Matisyahu

Tatum O'Neal, Jeff MacGregor

Kate Beckinsale, Bob Saget

Cheryl Hines, Anna Nalick, Mike Vanderjagt

Charles Grodin, Jordana Brewster

Anthony Hopkins

Bernie Mac, Beth Orton

Mischa Barton, Jeff Altman, Wicked Wisdom

Tommy Lee Jones, Anthony Hamilton

P Diddy, Train

Harrison Ford, Michael Bublé

Beyonce Knowles, Stephen A. Smith

Rachel Weisz, Beastie Boys

Senator John McCain, Heidi Klum

Martha Stewart, Michael Bublé

Geena Davis, INXS

Julianne Moore, Randy Jackson, The O'Jays

Charles Barkley, Catherine Keener

Jimmy Fallon, Hannah Teter, She Wants Revenge

Donald Trump, Bill Burr

Marcia Cross, Daytona 500 Winner

Matthew Fox, Brian Regan, Broadway's Jersey Boys

Philip Seymour Hoffman, The Teutuls

Amanda Peet, Jack Hanna

Hugh Laurie, Ne-Yo

Bruce Willis, The Strokes

Barbara Walters, Tyler James Williams

Sarah Jessica Parker

Harry Connick Jr., Clap Your Hands Say Yeah

Ricky Gervais, The Subways

Emma Thompson, Frank Caliendo, Beth Orton

Howard Stern, Carrie Underwood

Natalie Portman, Al Franken

Vin Diesel, Trey Parker & Matt Stone

Denzel Washington, Diablo Cody

Marcia Cross, Jenny Lewis and the Watson Twins

David Spade, Teddy Geiger

Sharon Stone, Mark Fainaru-Wada, Lance Williams

Ray Romano, Willie Nelson

Josh Hartnett, Chris Elliott, Yeah Yeah Yeahs

Antonio Banderas, Patrice Oneal, Flaming Lips

Liza Minnelli, Al Lubel

Billy Crystal, Johnny Damon

Geena Davis, Aaron Eckhart, Sonya Kitchell

Jason Randal, Mandy Moore, Ben Harper

Julia Louis-Dreyfus, Tyler Perry, Death Cab For Cutie

Paul Rudd, Gretchen Mol, Mary J. Blige

Eva Longoria, Barry Sonnenfeld

Jane Fonda, Shooter Jennings

Craig Furguson, Alexis Bledel, Tom Russell

Piedmont Bird Callers, Michael Douglas, Emmylou Harris, Mark Knopfler

Kerri Russell, Jerry Lee Lewis, Human Cannonball Team

Tom Hanks, Kanye West

Tom Cruise, Jamie Oliver

Rosie Perez, Danica Patrick

Julia Roberts, Pearl Jam

Vince Vaughn, K.T. Tunstall

Derek Jeter, Michelle Monghan, Barnum & Bailey Circus

Kurt Russell, The Little Willies

Jason Lee, Jack Hanna

Teri Hatcher, Tom Dreesen, Michel Lauziere

Edie Falco, Pete Correale, Van Hunt

Kid Scientists, William Shatner, Angels & Airwaves

Debra Messing, Chris Russo

Bruce Willis, Goldfrapp

Stupid Pet Tricks, Rebecca Romijn, Eagles of Death Metal

Jennifer Garner, Harry Hill

Martha Stewart, Dixie Chicks, Criss Angel

Martin Short, James Blunt

Jennifer Aniston, Rob Zombie

Halle Berry, Harold Perrineau, Jesse James

Bill Maher, Rita Wilson

Lindsay Lohan, Sam Hornish Jr.

Bonnie Hunt, Elvis Costello, Allen Toussaint

Kyra Sedgwick, Al Franken

Meredith Vieira, Jeremy Piven, My Morning Jacket

Michael Keaton, Wolfmother

Paris Hilton, Will Shortz

Tim Russert, Cat Power

Stephen Colbert, Mark Cuban, Neko Case

Sandra Bullock, Widespread Panic

Robert Duvall, Tommy Tiernan, Sonic Youth

Adam Sandler, Julie Chen

Nicole Richie, Brandon Routh

Dwyane Wade, Amy Sedaris, Morningwood

Meryl Streep, Yellowcard

Al Gore, Rock Kills Kid

Kevin Spacey, The Streets

Anne Hathaway, Jim Gaffigan, Dashboard Confessional

Robert Downey Jr., Fred Willard, Martha Wainwright

Johnny Depp, Broken Social Scene

Tom Brokaw, Paul Simon

John Witherspoon, The Fray

Paul Reubens, Yunjin Kim, Nelly Furtado

Denis Leary, New York Met David Wright, the Wreckers

Luke Wilson, Band of Horses

Anderson Cooper, Greg Fitzsimmons

Kate Hudson, Patrice O'Neal

Regis Philbin, Bryce Dallas Howard

Uma Thurman, Morgan Spurlock, egg catchers Brad Freeman and Patrick Breault

Martin Short, Pink

Donald Trump, Nick Griffin, Sam Roberts

Colin Farrell, India.Arie

Greg Kinnear, reptile expert Dr. Darrel Frost, Tapes 'n Tapes

Scarlett Johansson, Paul Teutul Jr. and Sr.

Johnny Depp, the Spinners

Jamie Foxx, Tom Dreesen

Samuel L. Jackson, Gnarls Barkley

Hilary Duff, Jason Randal, Dirty Pretty Things

Jessica Biel, Christina Aguilera

Whoopi Goldberg, sock puppeteer Jack Fisett, Fatboy Slim

Edward Norton, Greg Fitzsimmons

Julianna Margulies, Andy Sansone, Outkast

Chris Elliott, Rep. Nancy Pelosi, Razorlight

John McEnroe, Artie Lang, Busta Rhymes

Mark Wahlberg, Ruth Regina, M. Ward

Maggie Gyllenhaal, Albert Pujols