Will Arnett, Lisa Lampanelli, Guided by Voices

Brian Williams, WU LYF

Tina Fey, Jeremy Irvine, Barr Brothers

Kristen Bell, Dan Naturman, Blind Pilot

Mark Wahlberg, Heather Morris, Snow Patrol

Kate Beckinsale, Marv Albert, The Little Willies

Dolly Parton, Alan Zweibel

Sen. John McCain, Johnny Winter

Viggo Mortensen, Dennis Regan, Tony Bennett

Simon Baker, Elizabeth Banks, Seal

Ricky Gervais, Jessica Chastain, Kathleen Edwards

Marg Helgenberger, Michael Fassbender, Ellie Goulding

Kathy Griffin, Simon Helberg, Joseph Arthur

Dana Carvey, Jon Fisch, Los Campesinos!

Jennifer Lopez, Rob Schneider, James McCartney

Bill Murray, Girls' Generation

Howard Stern, The Airborne Toxic Event

Woody Harrelson, Stephen Merchant, Lana Del Rey

Michelle Williams, Jake Johannsen, Ziggy Marley

Eli Manning, Sarah Michelle Gellar, Die Antwoord

Denzel Washington, The Fray

Ryan Reynolds, Ellie Kemper, Dierks Bentley

Nicolas Cage, Michelle Dockery, The Kills

David Spade, Betty Wright

Reese Witherspoon, Michael Weatherly, Top Ten by Sports Illustrated Swimsuit models, Kasabian

Jon Stewart, American Bagging Champion Stephanie Teteak, Yelawolf with Kid Rock

Joan Rivers, Andrew Lincoln, Jason Mraz

Kristen Wiig, Mike Birbiglia, Butch Walker and the Black Widows

Jack Hanna, Jesse Tyler Ferguson

Alec Baldwin, Eric Hutchinson

Paul Rudd, John Witherspoon, Heartless Bastards

Kristin Chenoweth, Joe Scarborough, K'naan featuring Nelly Furtado

Matthew Broderick, Nick Griffin, We Are Augustines

Ed Helms, Dan Patrick, Lyle Lovett

Nathan Lane, Pauley Perrette, Estelle

Neil Patrick Harris, Taylor Kitsch, Robert Glasper Experiment featuring Lupe Fiasco & Bilal

Jon Hamm, Ted Alexandro, White Rabbits

Will Ferrell, Jon Bernthal

Amanda Peet, Nick Offerman, Top Ten by Cee-Lo Green, The Chieftains with the Low Anthem

Martin Short, The Ting Tings

Michelle Obama, Esperanza Spalding

Jennifer Lawrence, Gail Collins, The Shins

Debra Messing, Josh Hutcherson, Oberhofer

Rachel Maddow, Timothy Olyphant, Train

Jason Sudeikis, Lionel Richie, Jason Aldean

Chris Elliott, Mohamed Nasheed, Justin Townes Earle

Tracy Morgan, Jim Rome, The Broadway musical 'Once'

Megan Mullally, Joe Wong, Band of Skulls

Keith Olbermann, Allison Williams, Lukas Nelson & Promise of the Real

Kiefer Sutherland, Eugene Levy, The Punch Brothers

Ricky Gervais, Cobie Smulders, Tennis

Sean Hayes, Shooter Jennings

Magic Johnson, Larry Bird, Jim Gaffigan, Kaiser Chiefs

Billy Crystal, Alabama Shakes

Julia Louis-Dreyfus, Keith Alberstadt, Bonnie Raitt

Jason Segel, Zach Wahls, Fun

Amy Poehler, Wendy Williams, Trampled by Turtles

Rob Lowe, Gov. Brian Schweitzer, The War on Drugs

Robin Williams, Andrew Luck

Madden NFL 13 Cover Calvin Johnson, Chris Hemsworth, Darrell Hammond, Miike Snow

Don Rickles, Carrie Underwood

Seth Meyers, Krysten Ritter, Father John Misty

Stupid Pet Tricks, Johnny Galecki, Norah Jones

Stephen Colbert, Chloe Grace Moretz, The cast of 'Nice Work If You Can Get It'

Anderson Cooper, Yves Rossy, Electric Guest

Dr. Phil McGraw, Beth Behrs, Spiritualized

Jim Parsons, Mika Brzezinski, Macy Gray

Eva Longoria, Tom Dreesen, Florence and The Machine

Kid Scientists, Elizabeth Banks, Edward Sharpe & The Magnetic Zeros

Jon Cryer, Tommy Johnagin, M. Ward

Kelly Ripa, Adam Scott, Tenacious D

Brian Williams, El-P

Betty White, Moses Maddox, Best Coast

Conan O'Brien, Regina Spektor, John Mayer

Sacha Baron Cohen, Julie Chen, Beach House

Lea Michele, Barry Sonnenfeld, Shaolin Warriors of Ringling Bros

Will Smith, Gossip

Piedmont Bird Callers, Bill O'Reilly, Pitbull

Joan Rivers, Dario Franchitti, Silversun Pickups

Neil Patrick Harris, Noomi Rapace, Alan Jackson

Jane Fonda, Mayor of London Boris Johnson, Jimmy Cliff

Bill Murray, The Temper Trap

Mark Wahlberg, Sebastian Vettel, Black Box Revelation

Jack Hanna, Patti Smith

Adam Sandler, Jerry Douglas

Regis Philbin, Lenny Marcus, Elizabeth Cook

Denis Leary, Olivia Wilde, The Pierces

Jeff Daniels, Benjamin Walker, Walk the Moon

Alec Baldwin, Michael Kiwanuka

Justin Bieber, Michael Ian Black

Emma Stone, Jimmie Walker, Diamond Rugs

LeBron James, Andrew Garfield, Maroon 5

Channing Tatum, Scott Pelley, The Gaslight Anthem

Blake Lively, Drew Brees

Ray Romano, Tom Waits, Top Ten by American League All-Stars

Queen Latifah, Fred Armisen, Cory Chisel and the Wandering Sons

Bryan Cranston, R.A. Dickey, Zac Brown Band

Anne Hathaway, Moody McCarthy, Loudon Wainwright III

Morgan Freeman, Gallagher, Nas

Roseanne Barr, Aubrey Plaza, Jeff the Brotherhood

Kyra Sedgwick, Mike Golic and Greenberg, Red Wanting Blue

Woody Harrelson, Todd Barry, Grafitti6

Will Ferrell, Rufus Wainwright

Zach Galifianakis, Former U.S. Army Sgt. Valerie Brown, Allen Stone

Jonah Hill, Dr. Leonard Girardi, Milo Greene

Joel McHale, Andrew Norelli, Will.I.Am

Andy Samberg, Ashton Eaton, Glen Hansard

Jennifer Garner, The U.S. Women's Olympic Gymnastics team, Rodriguez

Tom Brokaw, Dana Vollmer, Beth Orton

Tracy Morgan, Erik Kynard, Ben Howard

Kelsey Grammer, Olivia Munn, Train

Bill Hader, Mary-Louise Parker, The Walkmen

Rachel Maddow, Serena Williams, Elle King

Kathy Griffin, Michael Somerville, Josh Turner

Jake Gyllenhaal, Sharon Osbourne, Neon Trees

Amy Adams, Paul Teutul Sr. & Paul Teutul Jr., Hacienda

Michelle Obama, The Chevin

Bruce Willis, Brian Regan, The Heavy

Claire Danes, Dwyane Wade, Bob Mould

Emma Watson, Julie Chen, Matchbox Twenty

Howard Stern, Jason Aldean

Joseph Gordon Levitt, Mindy Kaling, Of Gentlemen and Cowards

President Barack Obama

Michael Strahan, Arthur Meyer

Nathan Lane, Ryan Hunter-Reay, The Killers

Steve Martin, Gotye

Stupid Human Tricks, Kaley Cuoco, The Whigs

David Cameron, Jonny Lee Miller

Jimmy Fallon, Neil Young, Lupe Fiasco

Regis Philbin, Tom Dreesen, Dwight Yoakam

Stephen Colbert, Theresa Caputo, Martha Wash

Martin Short, Kat Dennings

Tina Fey, Rick Santorum, LP

Craig Ferguson, Anna Kendrick, The Raveonettes

Billy Crystal, The Wallflowers

Jack Hanna, Max Greenfield

Kevin James, Chris Elliott, Miguel

Salma Hayek Pinault, Nick Offerman, KISS

Lucy Liu; Rob Corddry; Daughter

John Goodman, Jeff Altman, Jamey Johnson with Alison Krauss

Tom Hanks; Tony Bennett

Taylor Swift; Rachel Maddow

Bill O'Reilly; Nicole Snooki Polizzi; The Lumineers

Donald Trump; Adam Levine; Carly Rae Jepsen

Dennis Quaid; Krysten Ritter; Diamond Rings

Denzel Washington, Paul Banks

Jim Cantore; Ken Burns; Andrew Bird

Katie Couric; Rita Ora

Steven Tyler and Joe Perry; Judy Greer; Aerosmith

Jason Sudeikis; Michael Che; Ultraĩsta

Ricky Gervais; Simon Helberg; Ty Segall

Brian Williams; Ne-Yo

Robin Williams; Lianne La Havas

Anderson Cooper; Myq Kaplan; Alberta Cross

Bradley Cooper; Robert Klein; Soundgarden

Julianna Margulies; Mumford & Sons

Alec Baldwin; Dirty Projectors

Zooey Deschanel; Lisa Lampanelli; Donald Fagen

Dr. Phil McGraw; Carmen Lynch; Divine Fits

Jessica Biel; Pete Townshend; Philip Phillips

Amy Poehler; Josh Hutcherson; Tegan and Sara

Scarlett Johansson; Willie Nelson; Gary Clark Jr.

Led Zeppelin; John Krasinski; Paloma Faith

Matt Damon; Martin Freeman; JD McPherson

Albert Brooks; Diana Krall

Bill Murray; Vintage Trouble

Dustin Hoffman; One Direction

Anne Hathaway; Jake Johnson; “The President's Own” United States Marine Band

Amanda Seyfried; Natalia Makarova; Awolnation

Billy Crystal; James Balong; Grizzly Bear

Jamie Foxx; Julie Chen; DIIV

Samuel L. Jackson; Carrie Brownstein & Fred Armisen; Jason Isbell and the 400 Unit

Tom Cruise; MNDR

Paul Rudd; Alicia Keys

Seth Rogen; John Witherspoon

Katie Holmes; Jon Bon Jovi

Naomi Watts; Jay Thomas; Darlene Love