Julianne Moore, Aries Spears, Godsmack

David Duchovny, Greg Behrendt, OK Go

Kiefer Sutherland, Joely Fisher, Ben Harper

Alan Alda, Sophia Bush, Citizen Cope

Zach Braff, Artie Lange, John Mayer

Ashton Kutcher, Tracy Morgan, John Mayer

Dwayne "The Rock" Johnson, Al Franken, air guitar expert Björn Türoque

Matthew Perry, Xzibit, The Rapture

Gisele Bundchen, Jim Cramer, Madeleine Peyroux

Johnny Knoxville, Caroline Rhea, Bonnie "Prince" Billy

Bob Newhart, Elle Macpherson, Jimmy Carr

Jennifer Love Hewitt, John Krasinski, Ben Kweller

Jason Lee, Bridget Moynahan, Chingy

Marcia Cross, David Gregory, Sam Moore

Christopher Walken, Michael Clarke Duncan, Scissor Sisters

Billy Bob Thornton, Mr. T, The Wreckers

John Stamos, Amy Poehler, Nigella Lawson

Dennis Miller, Rachael Ray, Evanescence

Martin Scorsese, Harland Williams, The Decemberists

Brian Williams, Scott Wolf, Larry Miller

Jaime Pressly, Jerome Bettis, Jerry Lee Lewis

Alex Trebek, Yunjin Kim, Barenaked Ladies

John Lithgow, Lewis Black, Gomez

Alec Baldwin, John Cena, Demetri Martin

Sarah Michelle Gellar, Bob Saget, Robert Randolph & The Family Band

Helen Mirren, Jim Gaffigan, Basement Jaxx

Jason Schwartzman, Arielle Kebbel, Jenny Lewis

Regis Philbin, Alessandra Ambrosio, Dierks Bentley

Tina Fey, Steven Wright, Barbara Stewart

Kirsten Dunst, Harry Shearer, Corinne Bailey Rae

Nathan Lane, Jason Sudeikis, Ben Folds

Diddy, Joe Buck, Frank Black

Charles Barkley, Kristin Chenoweth, Cat Power

The Skeleton Show

Borat, Jack McBrayer, Mastodon

John Leguizamo, Arden Myrin, Los Abandoned

Darrell Hammond, Jesse Bradford, Prof. Kevin Warwick

Russell Crowe, Jorge Garcia, Dean Karnazes

Will Ferrell, Tom Everett Scott, Death Cab For Cutie

Howie Mandel, James Lipton, Mat Kearney

Meredith Vieira, Greg Grunberg, Old Crow Medicine Show

Barbara Walters, Dax Shepard, Los Lobos

Robin Williams, Christian Slater, Panic! At The Disco

Jack Black & Kyle Gass, Joshua Jackson, Tenacious D

Elijah Wood, Jon Lovitz, Jud Hale

Martin Short, Flavor Flav, Damien Rice

Rachel Weisz, Masi Oka, Army of Anyone

James Spader, Amy Sedaris, Robyn Hitchcock

Will Arnett, Alyson Hannigan, Billy Talent

Ethan Hawke, Jim Gaffigan, The Brand New Heavies

Hugh Jackman, Tiki Barber, Mike Birbiglia

Matthew Broderick, Lisa Edelstein, Jet

Jude Law, Kristen Wiig, The Brian Setzer Orchestra

Martha Stewart, Brian Posehn, My Morning Jacket

Lucy Liu, Tillie the Canine Artist

Tom Brokaw, Ed Helms, Sarah McLachlan

Jennifer Connelly, Jason Segel, Joan Jett and the Blackhearts

Kevin Nealon, Angela Kinsey, Deftones

Rob Lowe, Rashida Jones, Drake Bell

Julianna Margulies, Aries Spears, Mike Lupica

Chazz Palminteri, Seth Meyers, TV On The Radio

Cameron Diaz, Dennis Haysbert, Dashboard Confessional

Ricky Gervais, Steven R. Schirripa, The Matt Savage Trio

Jeremy Irons, Terry Crews, Aimee Mann

Howard Stern, Jim Gaffigan

Sylvester Stallone, Carla Gugino, Matt Mays & El Torpedo

Patricia Heaton, Jason Ritter, Tony Bennett

Ben Stiller, Ving Rhames, Joshua Bell

Andy Samberg, Stuart Scott, Sean Lennon

Ewan McGregor, Manny Puig, Jordana Spiro

Carson Daly, Michelle Trachtenberg, Nellie McKay

LL Cool J, Abigail Breslin, Gov't Mule

Placido Domingo, Patton Oswalt, moe.

Jarod Miller, Dulé Hill, Louis C.K.

Cedric the Entertainer, Orlando Jones, John Pizzarelli

Matt Lauer, America Ferrera, Little Big Town

Donald Trump, Meagan Good, Ron Sexsmith

David Arquette, Lonny Ross, Chuck "The Iceman" Liddell

Hilary Swank, Artie Lange, The Black Keys

Kiefer Sutherland, Jill Hennessy, Gym Class Heroes

Tracy Morgan, Jim Gaffigan, Sparta

Brian Williams, Dominic Purcell, Dana Gould

Megan Mullally, Colin Hanks, Annuals

Liam Neeson, Ali Larter, Brand New

Brad Garrett, Sarah Silverman, Peter Bjorn And John

Kristin Davis, Bob Saget, Paolo Nutini

Sienna Miller, Goran Visnjic, Paul Weller

Serena Williams, Donal Logue, Kevin Brennan

Charlize Theron, Bill Hader, Stars of Track and Field

Kristin Chenoweth, Mindy Kaling, The Slip

Dr. Phil McGraw, Emily Deschanel, Calexico

Cuba Gooding Jr., Joy Behar, Jonathan Katz

Bob Costas, Ashley Tisdale, Josh Groban

Dylan McDermott, Michael Urie, Lamb of God

Martin Lawrence, Hayden Panettiere, Hinder

Eva Longoria, Fred Willard, Lily Allen

Drew Barrymore, Marc Maron, The Apples in Stereo

Nicolas Cage, Natalie Morales, John Mulaney

Christina Ricci, Alan Cumming, Joshua Radin

Sen. Chuck Schumer, Tracee Ellis Ross, The Holmes Brothers

Heather Graham, Lewis Black, Explosions in the Sky

Jim Carrey, Al Roker, Jonny Lives!

Jimmy Fallon, Keith Olbermann, Steven Kaplan

Billy Bob Thornton, J. Alexander, G. Love

Jim Gaffigan, Liev Schrieber, Solomon Burke

Jake Gyllenhaal, Lance Armstrong, Bayside

Larry King, Izabel Goulart, 'Biscuit Lady' Carol Fay

Anderson Cooper, Rob Corddry, Son Volt

Ted Koppel, Tom Cavanagh, Relient K

David Hyde Pierce, Kate Mara, Dr. Dog

Chris Rock, Christopher Meloni, Mary Weiss with The Reigning Sound

Andy Richter, Len Berman, The Shins

Julia Louis-Dreyfus, Harland Williams, Neil deGrasse Tyson

Jeff Goldblum, Ivanka Trump, Pete Yorn

Tom Arnold, Rainn Wilson, Jesse Malin

Bernie Mac, Chris Hansen, Daughtry

Don Cheadle, Neil Patrick Harris, Shane Mauss

Adam Sandler, Sarah Thyre, Lindsey Buckingham

Liv Tyler, Gerard Butler, The Fratellis

Quentin Tarantino, Jesse L. Martin, Brian Kiley

Rosario Dawson, Jason Sudeikis, Martina McBride

Ice Cube, B.J. Novak, Clap Your Hands Say Yeah

Diddy, David Gregory, Kaiser Chiefs

Michael Imperioli, Jim Cramer, Albert Hammond, Jr.

Jeff Daniels, Zoë Bell, The Alternate Routes

Martin Short, Cheryl Hines, Cold War Kids

Tina Fey, Kevin Pollack, Mystery

Molly Shannon, Tiki Barber, Of Montreal

Ray Liotta, Mary Lynn Rajskub, Joseph Arthur

Martha Stewart, Rob Huebel, Ian Edwards

Darrell Hammond, Andrew W.K., Blue October

Tyra Banks, Masi Oka, Brandi Carlile

Garry Shandling, Adam Brody, Ricky Skaggs & Bruce Hornsby

Dana Carvey, Jasper Redd, Arctic Monkeys

George Lucas, Will Arnett, Chris Isaak

Robin Williams, The Glide Ensemble

Randy Jackson, Patton Oswalt, Frisbee Golf National Champion David Feldberg, Bob Weir & RatDog

Snoop Dogg, Tom Waits

Amanda Peet, Morgan Spurlock, Secondhand Serenade

Zach Braff, D. J. Qualls, Jimmy Carr

Howie Mandel, Criss Angel, Patrick Wolf

Lindsay Lohan, Larry the Cable Guy, Stephen Marley featuring Damien

Antonio Banderas, Sarah Chalke, The Avett Brothers

William Shatner, Eric Dane, mtvU's Best Music on Campus Winner

Tom Selleck, John Stamos, Dan Mintz

Rebecca Romijn, Donald Faison, Silversun Pickups

Amy Poehler, Dave Annable, M. Ward

Luke Wilson, Oscar Nuñez, Blonde Redhead

Dominic Monaghan, Chris 'Ludacris' Bridges, Rickie Lee Jones

Amy Sedaris, Lester Holt, Loudon Wainwright III

America Ferrera, Eddie Izzard, Mark 'Dr. Bugs' Moffett

Mike Myers, Seth Rogen, The Academy Is...

Dane Cook, 'Dancing With the Stars' winner Apolo Anton Ohno, Mando Diao

Paul Rudd, Elisha Cuthbert, Kings of Leon

Brian Williams, Leslie Mann, Los Straitjackets with Big Sandy

Debra Messing, Marc Maron, Nelly Furtado

Marg Helgenberger, Steven R. Schirripa, John Mulaney

Nicole Richie, Billy Connolly, Crowded House

Seth Green, Eli Roth, EL-P

Tim Russert, Ginnifer Goodwin, Feist

Kevin Dillon, Jim Cramer, Patty Griffin

Kyra Sedgwick, John Cena, Andrew Bird

Jessica Alba, Bear Grylls, Paul F. Tompkins

Tea Leoni, Tyrese Gibson, The White Stripes

Steve Carell, Jennifer Esposito, Flight of the Conchords

Wanda Sykes, Nick Offerman, illusionist Hans Klok with Pamela Anderson

John Krasinski, Louis CK, The Mooney Suzuki

Lauren Graham, Steve Zahn, Rooney

Jarod Miller, Jason Priestley, Dan Naturman

Denis Leary, Mark Consuelos, Against Me!

Daniel Radcliffe, Carlos Mencia, Art Brut

Emma Watson, Patton Oswalt, Mark Ronson

Jason Sudeikis, Janeane Garofalo, They Might Be Giants

Christopher Walken, Tim Meadows, Nick Lowe

Jessica Biel, Artie Lange, The Cribs

Adam Sandler, Vera Farmiga, Pegi Young

Queen Latifah, Matt Groening, Fountains of Wayne

Kevin James, Jordana Spiro, Greg Giraldo

John Leguizamo, James Blake, Marc Broussard

Andy Samberg, Harry Shearer, Tegan & Sara

Seth Rogen, Ann Curry, wine expert Gary Vaynerchuk

Anne Hathaway, Harland Williams, Mavis Staples

Jackie Chan, Simon Pegg, Just Jack

Chris Tucker, Tori Spelling, Shiny Toy Guns

Glenn Close, Michael Cera, Modest Mouse

Claire Danes, Jonah Hill, Teddy Thompson

Cuba Gooding, Jr., Jackie Hoffman, Bruce Perry

Amanda Bynes, Judd Apatow, Straylight Run

Bob Saget, Maggie Q, Shane Mauss

Jeff Goldblum, Devon Aoki, Okkervil River

Kelly Preston, Ryan Reynolds, Ozomatli

Kevin Bacon, Will Forte, Eisley

Scarlett Johansson, Kevin Nealon, Locksley