Whitney Cummings, Nicole
Tracy Morgan, Rick & Corey Harrison, Shaggy
Michelle Williams, Josh Lucas, Chris Cornell
Glenn Close, Trevor Noah, Van Hunt
Janet Jackson, Larry the Cable Guy, Eli Young Band
Queen Latifah, Paul
Liam Neeson, Jack's Mannequin
Gerard Butler, Betty White
Tilda Swinton, Jennifer Hudson, Graffiti6
Sam Worthington, Sherri Shepherd, Adam Lambert
Jennifer Garner, Ross Matthews, Parachute
Wanda Sykes
Steven Tyler, Ryan Seacrest, Randy Jackson, Sarah Colonna
Madonna, Chris Colfer, Joe Perry
Michelle Obama, Mark Harmon, Imelda May
Daniel Radcliffe, Vanessa Hudgens, Evanescence
Drew Barrymore, Blake Shelton
Debra Messing, Jean Dujardin, Bush
Dwayne Johnson, Miranda Cosgrove, Cirque du Soleil
Chelsea Handler, Jon Huntsman, 2Cellos
Chris Pine, Lisa Lampanelli, Anthony Hamilton
Denzel Washington, Octavia Spencer, Estelle
Rachel McAdams, Cee-Lo Green
Jennifer Lopez, the Civil Wars
Tyler Perry, Alexandra Wentworth, the Cranberries
Bill Maher, Punch Brothers
Amanda Seyfried, Billy Gardell, Monica, Brandy
Christina Aguilera, Dave Salmoni, The Fray
Taylor Swift, Michael Clarke Duncan, Robert Randolph, Los Lobos, Chris Layton
Bill O'Reilly, Rob Riggle, Rumer
Tim Allen, Rocket City Rednecks
Meredith Vieira, Jackson Murphy
Jennifer Aniston, Adam Levine
Megan Fox, Michel Hazanavicius, Mariachi El Bronx
Rob Schneider, Khloe Kardashian Odom, Mona
Sen. John McCain, Elizabeth Olsen, Romeo Santos
Julianne Moore, Dr. Brady Barr, Chickenfoot
Emily Blunt, Geoff Stults, Scars on 45
Jessica Simpson, Adam Carolla, Soja
Jonah Hill, Bethenny Frankel, Shooter Jennings
Channing Tatum, Drew Brees, Meat Loaf
Kiefer Sutherland, Kathryn Hahn, Andy Grammer
Jimmy Fallon, 8-year-old presidential whiz kid H.L. McCullough, Toby Keith
Jamie Lee Curtis, Armie Hammer
Rep. Ron Paul, Frank Caliendo, the Wanted
Kim Kardashian
Arsenio Hall, Lily Collins
Christina Aguilera, Melanie Fiona featuring J. Cole
Elizabeth Banks, Carson Daly
The Pierces
Rainn Wilson, Debbie Gibson, Gavin DeGraw
Piers Morgan, Liam Hemsworth, Mat Kearney
Nicole Richie, Alan Jackson
Betty White, D.J. Pauly D
Maya Rudolph, Jason Biggs, Gym Class Heroes
David Gregory, Cee-Lo Green, Seal
Zac Efron, Jennie Garth, Grace Potter and the Nocturnals
Kristin Chenoweth, Julie Scardina, Rodrigo y Gabriela
Jane Lynch, Kevin Hart, Esperanza Spalding
Josh Hutcherson, Rachel Maddow, Eric Turner featuring Lupe Fiasco and Tinie Tempah
Albert Brooks, Austin
Blake Shelton, Chris Diamantopoulos, Feist
Jason Segel, Anna Faris, Far East Movement
Jesse Tyler Ferguson, Aubrey O'Day, Train
Jack Black, Daniel Holzman & Michael Chernow, Beirut
Adam Levine, Ziggy Marley
Diane Keaton, Natalie Coughlin, Moby
Mel Gibson, the Wanted
Steve Martin, Rashida Jones, Steve Martin & the Steep Canyon Rangers
Cameron Diaz, William Shatner, Lee Brice
Scarlett Johansson, Blake Shelton, K'Naan featuring Nelly Furtado
Robert Downey Jr., Katharine McPhee, Toast To Freedom
Kristen Stewart, James Morrison
Michelle Pfeiffer, Bear Grylls, Snow Patrol
Rick Santorum, Taylor Kitsch, B.o.B., O.A.R.
Garry Shandling, Alison Brie, the winner of 'The Voice'
Howie Mandel, Vinny Guadagnino, Sara Watkins
Jenna Fischer, Jay Mohr
Kourtney, Kim & Khloe Kardashian, Donny Deutsch, Karmin
Wanda Sykes, David Hasselhoff, Santana
Joel McHale, Jarod Miller, Bobby Brown
Hugh Laurie, Robert Griffin III
Sherri Shepherd, Julianne Hough, Tenacious D
Kevin Costner, Bailee Madison, Lisa Marie Presley
Josh Brolin, Ali Wentworth, Glenn Frey
Charlize Theron, Jeffrey Dean Morgan, Juanes
Glenn Close, the winner of American Idol, Nelly Furtado
Gen. Colin Powell, Greg Gadson, All American Rejects
Martin Short, Aubrey Plaza, Def Leppard
Emma Stone, Chris Hemsworth, Chris Robinson Brotherhood
Julia Louis-Dreyfus, the Beach Boys
Catherine Zeta-Jones, Louis Zamperini, Bret Michaels
Tom Cruise, skydivers Felix Baumgartner & Joe Kittinger, Kool & the Gang
Elizabeth Banks, Dan Patrick, Brandi Carlisle
Patrick Duffy, Linda Grey, Larry Hagman, Meghan McCain, Meiko
Terry Bradshaw, Ernie Brown Jr., Neal James, Rachel Bradshaw
Penelope Cruz, Rick Harrison, We Are Augustines
Salma Hayek, Adam Brody, Olly Murs
Steve Carell, Cory Booker, Glen Hansard
Matthew McConaughey, Natasha Leggero, Grouplove
Andy Samberg, Seth MacFarlane, Joe Henry featuring Lisa Hannigan
Katy Perry, Needtobreathe
Chris Pine, Rachael Ray, Everclear
Louis C.K., Lolo Jones, Delta Rae
Matt LeBlanc, Sig Hansen & Keith Colburn, Robin Thicke
Mila Kunis, Jim Norton, Justin Bieber
Tyler Perry, Rhys Ifans, Keane
Andrew Garfield, Of Monsters And Men
Wanda Sykes, Rob Riggle, Kimbra
Zachary Levi, B.o.B.
Morgan Freeman,
Denis Leary, Olivia Munn, Kenny Chesney
Dana Carvey, Nicki Minaj
Charlie Sheen
Kate Beckinsale, Adam Carolla
Newt Gingrich, Nicole
Rachel Weisz, Aaron Paul
Ben Stiller, Rose Byrne, Missy Higgins
Vince Vaughn, Travis Pastrana, Aretha Franklin
Colin Farrell, Jenni
Jessica Biel, Kevin Smith, the Lumineers
Julie Scardina, Dwyane Wade, MoZella
Jeremy Renner, Betty White, Joss Stone
Michelle Obama, Norah Jones
Kelsey Grammer, Jordan Burroughs, Ryan Star
Sylvester Stallone, Missy Franklin, Dwight Yoakam
Kristen Bell, Ryan Lochte, Regina Spektor
Jason Statham, Allyson Felix, the Offspring
Maya Rudolph, Jeff Foxworthy, Morning Parade
Shia LaBeouf, Jean-Claude Van Damme, fun.
Katie Couric, Dax Shepard, Emeli Sande
Kirsten Dunst, Chris Matthews, Smashing Pumpkins
Howie Mandel, Alejandro Escovedo
Dennis Miller, Joshua Radin
Owl City with Carly Rae Jepsen
Bill Maher, Tristan Prettyman
Savannah Guthrie, Dolph Lundgren
Lauren Graham, Dan Patrick
Kevin Hart, Rep. Ron Paul, Robert Cray
Adam Levine, Magic Johnson, Grace Potter
Ellen DeGeneres, Josh Lucas, Billy Ray Cyrus
Matthew Perry, Meghan McCain, OneRepublic
Richard Gere, Anthony Robles, Rascal Flatts
Justin Timberlake, Steve Nash, Ryan Bingham
Amy Poehler, Joe Scarborough, Big & Rich
Viola Davis, Paul Wesley, Bonnie Raitt
Zooey Deschanel, Anthony Anderson, ZZ Top
David Spade, Giancarlo Esposito, Rebecca Ferguson
Ann Romney, Seth MacFarlane, Bettye LaVette
Kirstie Alley, Mike
Liam Neeson, Lisa Lampanelli, the Gaslight Anthem
Christina Aguilera, Sherri Shepherd, the Piano Guys
Bryan Cranston, Rebel Wilson, Cher Lloyd
Carol Burnett, Armie Hammer, Lang Lang
Christina Applegate, Apolo Anton Ohno
Ben Affleck, Octavia Spencer, Neon Trees
Colin Farrell, Medal of Honor recipient Dakota Meyer, the Hives
Arnold Schwarzenegger, Bubba Watson, the Wallflowers
Tyler Perry, Oscar Pistorius, Plain White T's
Chelsea Handler, Placido Domingo
Terry Bradshaw, Mark Kelly, Grizzly Bear
Whitney Cummings, Rove McManus, the Script
Halle Berry, Ali Wentworth, Gary Clark Jr.
Denzel Washington, Richard Engel, M. Ward
President Barack Obama, No Doubt
Russell Brand, Jane Lynch
Sarah Silverman, Paula Deen
Simon Cowell, Britney Spears, Billy Gardell, Two Door Cinema Club
John C. Reilly, Jenni
Taylor Lautner, Lior Suchard, Macy Gray
Jamie Lee Curtis, Maggie Elizabeth Jones, ZZ Ward
Marion Cotillard, Olate Dogs
Kristen Stewart, Dax Shepard, Kip Moore
Daniel Craig, Dave Salmoni, Diamond Rings
Sally Field, Chris Matthews, Lord Huron
Meredith Vieira & Richard Cohen, Christina Perri
Lea Michele, Nev Schulman, Toby Keith
Keira Knightley, Whitney Cummings, Gin Wigmore
Helen Hunt, Paul
Tim Allen, Nolan Gould, Switchfoot
Chris Matthews, the Mowgli's
Jennifer Lawrence, Phil & Willie Robertson, Andy Grammer
Lindsay Lohan, David Gregory, Wanda Jackson
Joseph Gordon-Levitt, Kris Jenner, Dan Cummings
Bradley Cooper, Natasha Leggero, PSY
Jim Parsons, Maggie Elizabeth Jones, Delta Rae
Julie Bowen,
Wanda Sykes, Blake Shelton
Newt Gingrich, Ron Shirley, Grouplove
Marisa Tomei, Carson Daly, Il Volo
Gerard Butler, Olivia Munn, the Polyphonic Spree
Khloe Kardashian Odom, Adam Carolla, Matisyahu
Don Johnson, Julie Scardina, Darius Rucker
Bill O'Reilly, Krysten Ritter, Paloma Faith
Leslie Mann, Jim Rome, Garbage
Matt Damon, Chris Pratt, Of Monsters And Men
Ewan McGregor, Bailee Madison, Allen Stone
Albert Brooks, Kerry Washington, Willy Moon
Hugh Jackman, Maria Sharapova, J.D. McPherson
Bette Midler, Judd Apatow, Pentatonix
Megan Fox, Johnny Manziel, Colbie Caillat
Quentin Tarantino, LeAnn Rimes
Jamie Foxx, Carl Reiner, the winner of
Katherine Heigl, Marjorie Johnson, Johnny Mathis
Terry Bradshaw, Elle Fanning, Chris Mann
