Will Arnett, Lisa Lampanelli, Guided by Voices
Brian Williams, WU LYF
Tina Fey, 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
Viggo Mortensen, Tony Bennett
Simon Baker, Elizabeth Banks, Seal
Ricky Gervais, Kathleen Edwards
Marg Helgenberger, Ellie Goulding
Kathy Griffin, Joseph Arthur
Dana Carvey, Los Campesinos!
Jennifer Lopez, Rob Schneider, James McCartney
Stephen Merchant, Girls\' Generation
Howard Stern, the Airborne Toxic Event
Woody Harrelson, Lana Del Rey
Michelle Williams, Jake Johannsen, Ziggy Marley
Sarah Michelle Gellar, Joe Scarborough, Die Antwoord
Denzel Washington, the Fray
Ryan Reynolds, Ellie Kemper, Dierks Bentley
Nicolas Cage, thehugs
David Spade, Betty Wright
Reese Witherspoon, Michael Weatherly, a Top Ten List presented by Sports Illustrated Swimsuit models, Kasabian
Viola Davis, the 2012 Sports Illustrated Swimsuit cover model, Mark Ronson, Erykah Badu, the Dap-Kings, Zigaboo Modeliste
Jon Stewart, Yelawolf with Kid Rock
Joan Rivers, Andrew Lincoln
Kristen Wiig, Butch Walker
Jack Hanna, Jesse Tyler Ferguson
Alec Baldwin, Eric Hutchinson
Paul Rudd, John Witherspoon, Heartless Bastards
K\'naan featuring Nelly Furtado
Matthew Broderick, Nick Griffin, We Are Augustines
Ed Helms, Dan Patrick, Lyle Lovett
Nathan Lane, Estelle
Neil Patrick Harris, Taylor Kitsch, Robert Glasper Experiment featuring Lupe Fiasco & Bilal
Jon Hamm, White Rabbits
Actor Will Ferrell; actor Jon Bernthal.
Amanda Peet; Nick Offerman; The Chieftains; The Low Anthem; Cee Lo Green presents the Top Ten.
Actor Martin Short; The Ting Tings perform.
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
Jim Rome, a performance from the Broadway musical \"Once\"
Megan Mullally, Band of Skulls
Seth Meyers, Allison Williams, Lukas Nelson & Promise of the Real
Kiefer Sutherland, Eugene Levy, the Punch Brothers
Ricky Gervais, Cobie Smulders, Tennis
Sean Hayes, Jim Gaffigan, Shooter Jennings
Magic Johnson, Larry Bird, Kaiser Chiefs
Billy Crystal, Alabama Shakes
Julia Louis-Dreyfus, Bonnie Raitt
Jason Segel, Zach Wahls
Amy Poehler, Wendy Williams, Trampled by Turtles
Rob Lowe, Gov. Brian Schweitzer, the War on Drugs
Robin Williams, Andrew Luck
Chris Hemsworth, Darrell Hammond, Miike Snow
Don Rickles, Carrie Underwood
Seth Meyers, Father John Misty
Stupid Pet Tricks, Johnny Galecki, Norah Jones
Stephen Colbert, Chloe Grace Moretz, a performance by the Broadway 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, Best Coast
Conan O\'Brien, Regina Spektor, John Mayer
Julie Chen, Beach House
Lea Michele, Barry Sonnenfeld
Piedmont Bird Callers, Bill O\'Reilly, Pitbull
Joan Rivers, the winner of the Indianapolis 500, 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, Bootsy Collins
Adam Sandler, Jerry Douglas
TV host Regis Philbin; comic Lenny Marcus; Elizabeth Cook performs.
Actor Denis Leary; actress Olivia Wilde; The Pierces perform.
Actor Jeff Daniels; actor Benjamin Walker; Walk the Moon performs.
Actor Alec Baldwin; Mike Kiwanuka performs.
Singer Justin Beiber; actor and comic Michale Ian Black.
Emma Stone, Jimmie Walker, Diamond Rugs
LeBron James, Maroon 5
Channing Tatum, the Gaslight Anthem
Andrew Garfield, Drew Brees, Animal Collective
Ray Romano, Tom Waits, a Top Ten List presented by American League All-Stars
Queen Latifah, Fred Armisen, Cory Chisel, Buddy Guy
Bryan Cranston, R.A. Dickey, Zac Brown Band
Anne Hathaway, Moody McCarthy, Loudon Wainwright III
Michael Caine, Gallagher, Nas
Roseanne Barr, Aubrey Plaza, Jeff the Brotherhood
Kyra Sedgwick, Red Wanting Blue
Woody Harrelson, 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
The U.S. Women's Olympic Gymnastics team, Jennifer Garner, Rodriguez
Tom Brokaw, Dana Vollmer, a Top Ten List presented by Lionel Richie, Rick Ross
Tracy Morgan, Erik Kynard, Ben Howard
Kelsey Grammer, Olivia Munn, Train
Bill Hader, Mary Louise Parker, the Walkmen
Serena Williams, Elle King
Kathy Griffin, Michael Somerville, Josh Turner