Kevin Hart, Betty White, Dwight Yoakam
Arnold Schwarzenegger, Chumlee & Rick Harrison, Ziggy Marley
Courteney Cox, Joy Behar, Youngblood Hawke
Bill Maher, Nicole "Snooki" Polizzi, Jenni "JWoww" Farley, Miguel
Emma Stone, Josh Gad, the Whigs
Dustin Hoffman, Big Bad Voodoo Daddy
Ryan Seacrest, Keith Urban, Randy Jackson, Anthony Jeselnik, For King and Country
Ben Affleck, Kristen Bell, Rodriguez
Nicki Minaj, Billy Connolly, the Saturdays
Jessica Simpson, D.L. Hughley, Vintage Trouble
Mark Wahlberg, Ali Wentworth, JJamz
Naomi Watts, Richard Engel, Train
Bob Costas, Big Boi
Sally Field, Michael Kosta, Lord Huron
Dana Carvey, Emmy Rossum, Ben Harper with Charlie Musselwhite
Heidi Klum, Seann Willam Scott, Gary Allan
Dustin Hoffman, Kenny Loggins and Blue Sky Riders
Robert DeNiro, Sherri Shepherd, the Grascals
Catherine Zeta-Jones, Donny Deutsch, Lady Antebellum
Whitney Cummings, Jackie Weaver, Aaron Neville
Aubrey Plaza, Holly Williams
Quvenzhane Wallis, Benh Zeitlin, Lisa Loeb
Wanda Sykes, Branford Marsalis
Hugh Jackman, Jessica Chastain, Michael Bolton
Josh Duhamel, Kathryn Bigelow, Lianne La Havas
Tim McGraw, Bar Refaeli
Amy Adams, Adam Carolla, Hunter Hayes
Seth MacFarlane, Jenna Elfman, Norah Jones
James Spader, Lior Suchard, Far East Movement
Charles Barkley, Bob Fisher, Jewel
Anne Hathaway, Lester Holt, Eli Young Band
Jarod Miller, Colbie Caillat, Gavin DeGraw
Kathy Griffin, David Feherty, FM Radio
Kevin Bacon, Dennis Rodman, Kevin Eubanks
Robin Wright, Bonnie Raitt
Chelsea Handler, Edythe Kirchmaier, Sky Blu
Arsenio Hall, Tristan Prettyman
Meredith Vieira, Richard Roeper, thenewno2
Russell Crowe, Eli Roth, Robert Randolph with the Slide Brothers
Colin Farrell, Joey King, Boz Scaggs
David Duchovny, J.B. Smoove, Father John Misty
Steve Carell, Joey King, Shooter Jennings
Bill O'Reilly, Abigail Breslin, the Mavericks
Halle Berry, Rachel Maddow, Ashley Monroe
Olivia Wilde, Nick Offerman, Buddy Guy and the Experience Hendrix All-Star Band
Jerry Seinfeld, Mark Cuban, Jose James
James Franco, Jay Mohr, Owl City and Yuna
Craig Ferguson, Vera Farmiga, Harper Simon
Morgan Freeman, Rulon Gardner & Henry Cejuda, James Hunter
Jenna Fischer, Dennis Rodman, Black Prairie
Vanessa Hudgens, Chris O'Dowd, Gary Clark Jr.
Dwayne Johnson, Chris Paul, Atlas Genius
Don Cheadle, Wynonna Judd
Gerard Butler, Keegan-Michael Key & Jordan Peele, Crystal Bowersox
Keith Urban, Paula Deen, Django Django
Kristin Chenoweth, Justin Willman, Josh Groban
Kim Kardashian, Willie Geist, Imagine Dragons
Matthew Perry, Kristen Schaal, Goo Goo Dollls
Blake Shelton, Jim Rome
Rosario Dawson, Max Greenfield, Gloriana
Eva Longoria, Terry Crews, Cavalia's Odysseo
Demetri Martin, Gin Wigmore
Julia Louis-Dreyfus, Anthony Jeselnik, Vintage Trouble
Rebel Wilson, Jackson Galaxy, Hanson
Charlie Sheen, Andy Enfield, Brad Paisley
LL Cool J, Andy Cohen, Tegan and Sara
Adam Levine, Cyndi Lauper, the Airborne Toxic Event
Diane Keaton, Trevor Moore, Jake Bugg
Carol Burnett, Stephen Amell, Plain White T's
Emily Blunt, Black Rebel Motorcycle Club
Gwyneth Paltrow, JB Smoove, Billy Ray Cyrus
Robert Downey Jr., Kenny Smith, Avril Lavigne
Ben Kingsley, Larry the Cable Guy, the Band Perry
Cher & Georgia Holt, Dov Davidoff, Florida Georgia Line
Kathy Griffin, Eli Roth, Cheap Trick
Matt Lauer, AWOLNATION
Chris Evans, Kevin Smith
Magic Johnson, Savannah Guthrie, Fall Out Boy
Zach Braff, Connie Sawyer, Patty Griffin
Ken Jeong, Emeli Sande
Shakira, Marc Maron, Tom Jones
Aaron Eckhart, Sherri Shepherd, 98 Degrees
Miranda Lambert, Ross Matthews, Pistol Annies
Wanda Sykes, Martha Stewart, Drop City Yacht Club
Usher, Nick Offerman, Pyramids
Adam Sandler, Phil Jackson, Family of the Year
Mitt Romney, the winner of "American Idol"
Vince Vaughn, Kenny Smith, Scotty McCreery
Owen Wilson, Wayde King & Brett Raymer, LeAnn Rimes
Danny McBride, Khloe Kardashian Odom, the Wanted
Henry Cavill, Jessica Buchanan & Erik Landemalm, She & Him
Russell Crowe, Andrea Bocelli
Kevin Bacon, Bad Company
Jimmy Connors, Matthew Morrison
Kevin Hart, Trace Adkins & Colbie Caillat
Carson Daly, Betty White, Timeflies
Armie Hammer, Dave Salmoni, Boxer Rebellion
Billy Crystal, Pitbull
Kathy Griffin, Billy Gardell, Grouplove
David Gregory, the winner of "The Voice"
Harvey Fierstein, the Mowgli's
Terry Bradshaw, Steve Byrne, Joseph Arthur
Steve Carell, Ken Ilgunas, Barenaked Ladies
Sandra Bullock, Bob Saget, Il Volo
Whitney Cummings, Alex Minsky, John Fogerty
David Spade, Joey King, Grace Potter
Wanda Sykes, India.Arie
Charlie Day, Jeffrey Dean Morgan, Lionel Richie
Dane Cook, Nev Schulman, Matt Nathanson
John Malkovich, Olivia Munn, Blackberry Smoke
Helen Mirren, Ben Schwartz, the Olms
Bill Hader, Eliot Spitzer, Passenger
Savannah Guthrie, Anthony Jeselnik, Johnnyswim
Zachary Levi, Danica Patrick, Talib Kweli featuring Nelly & Abby Dobson
Jane Lynch, Serena Ryder
Anthony Hopkins, Amy Schumer, Robert Randolph and the Family Band
Howie Mandel, Marisa Miller, Sara Bareilles
Gillian Anderson, Jim Rash & Nat Faxon, Kenny Chesney
Aaron Paul, Selena Gomez
Ashton Kutcher, Jayma Mays, Hiatus Kaiyote
Cate Blanchett, Michael B. Jordan, Court Yard Hounds
Katy Perry, Cris Collinsworth, Kacey Musgraves
Kristen Bell, Phillip Phillips
Kristin Chenoweth, Josh Gad
Kate Hudson, Bob Costas, Kopecky Family Band
Casey Affleck, Allison Janney
Meredith Vieira, Jim Norton, Charlie Worsham
Bryan Cranston, Karolina Kurkova, Amos Lee
President Barack Obama
Matt Damon, Anna Faris, Parachute
Robin Williams, Mark Cuban, Gavin DeGraw
Jason Sudeikis, Jim Stacy
Jeff Daniels, Sherri Shepherd, Quinn Sullivan
Josh Duhamel, J.B. Smoove, Macklemore & Ryan Lewis
Matt LeBlanc, Sky Blu
Julie Scardina, Rod Stewart
Sen. John McCain, Diablo Cody, Booker T. Jones with Mayer Hawthorne
Bill Maher, Aisha Tyler
Christina Applegate, Rob Corddry, White Lies
Vince Vaughn, Olivia Munn, Vintage Trouble
Simon Cowell, Adam Carolla, American Authors
Martin Short, Meghan McCain, Backstreet Boys
Rose Byrne, Jennifer Nettles
Charlie Sheen, Jim Rome, Trombone Shorty
Hugh Jackman, Aisha Tyler, OneRepublic
Zooey Deschanel, Terry Crews, Buena Vista Social Club
Chris Hemsworth, Kristen Schaal, Sheryl Crow
Neil Patrick Harris, Demi Lovato, Five for Fighting
Christina Aguilera, Joy Behar, Valerie June
Tim Allen, Dwayne Wade, Fitz & the Tantrums
Jimmy Fallon, Lior Suchard, Billy Currington
Justin Timberlake, Paula Patton
Olivia Wilde, Adam Scott, Cher Lloyd
Dana Carvey, Cee-Lo Green, Goodie Mob
Julia Louis-Dreyfus, Ron Paul, Little Big Town
Sandra Bullock, Gregory Porter
Magic Johnson, Marjorie Johnson, Gary Clark Jr.
Joseph Gordon-Levitt, Jay Mohr, Mika featuring Ariana Grande
Kathy Griffin, Newt Gingrich, Demi Lovato
Julianne Moore, Billy Gardell, Stone Temple Pilots with Chester Bennington
Terry Bradshaw, Nelly
Drew Barrymore, D.L. Hughley, the Avett Brothers
Billy Crystal, Nicole "Snooki" Polizzi, Jenni "JWoww" Farley, Toni Braxton, Kenny "Babyface" Edmonds
Whitney Cummings, Ann Romney, Lissie
Lauren Graham, Chris Matthews, Tom Odell
Rosie Perez, Tenacious D
Michael Douglas, Larry the Cable Guy, Thomas Rhett
Kristin Chenoweth, Ross Matthews, Joan Jett and the Blackhearts
Harrison Ford, Piers Morgan, Daughtry
Emma Roberts, Dave Salmoni, Diane Birch
Wanda Sykes, Richard Engel, Scotty McCreery
Adam Levine, Ali Wentworth, Steve Nieve with Elvis Costello
Savannah Guthrie, Mark Cuban, Kodaline
Kim Kardashian, Abigail Breslin, Two Door Cinema Club
Matthew McConaughey, Eli Roth, the Fray
Andy Cohen, Empire of the Sun
Anthony Hopkins, Sting
Liam Hemsworth, JB Smoove, the Rides featuring Stephen Stills & Kenny Wayne Shepherd
Ellen DeGeneres, Shaun White, Tired Pony
Andy Sandberg, the Neighbourhood
Mariska Hargitay, Sen. Ted Cruz
Casey Affleck, Kelly Clarkson, Lyle Lovett
Matt Lauer, Carrot Top, Cults
Bill Cosby, Chris Pratt, Gary Allan
Craig Ferguson, JRand featuring Flo Rida
Bill O'Reilly, Guy Fieri, Lee Brice
Whoopi Goldberg, TOTEM from Cirque de Soleil
George W. Bush, Ty Barnett, Ben Harper with Charlie Musselwhite
Blake Shelton, Kathie Lee Gifford, Hoda Kotb, Imelda May
Kristen Bell, David Gregory, Julian Lennon
Jim Parsons, John Downer
Bette Midler, Michael Buble
Quentin Tarantino, Jim Stacy, Luke Bryan
Garth Brooks, Jim Edds
Christina Aguilera, Jay Mohr
Simon Cowell, Megyn Kelly, MS MR
Kirstie Alley, Ernie Brown Jr., Switchfoot
Tyler Perry, Ken Jeong, the Head and the Heart
Kevin Hart, Brooklyn Decker, Chris Young
Carson Daly, Billy Ray Cyrus
Meredith Vieira, Jake Bugg
Olivia Wilde, Julie Scardina, Johnny Mathis
Christina Applegate, Kevin Nealon, the winner of "The Voice"
Sylvestor Stallone, Judd Apatow, Libera
Michael Strahan, Leona Lewis
Louis C.K., Sen. John McCain, Meghan McCain, Plain White T's
Mark Wahlberg, Jeff Foxworthy, Salaam Remi featuring Akon
Steve Carell, Kathryn Hahn, Jake Clemons
Leslie Mann, David Koechner
Kevin Bacon, Sherri Shepherd, Mary Lambert
Jennifer Lopez, Aaron Eckhart, Dorian Holley
Matt Damon, Larry the Cable Guy, Chris Isaak
Vanessa Hudgens, Foreigner
Mark Harmon, Kristin Chenoweth
Chelsea Handler, Bob Costas, Sharon Jones & the Dap-Kings
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Adam Sandler, Ali Wentworth, Sheryl Crow
Charlie Sheen, Joy Behar, Neon Trees
Rep. John Boehner, Matt LeBlanc, Dorian Holley
Terry Bradshaw, Darius Rucker
Dana Carvey, Earvin "Magic" Johnson, A Great Big World
Wanda Sykes, Thomas Haden Church, Dwight Yoakam
Bill Maher, Whitney Cummings, Jennifer Nettles
Miley Cyrus, Howie Mandel, Sarah McLachlan
Tim Allen, Dave Salmoni, Sara Bareilles
Jimmy Fallon, Betty White, Bonnie Raitt
Matthew McConaughey, Charles Barkley, Lyle Lovett
Sandra Bullock, Blake Shelton, Vintage Trouble
Billy Crystal, Garth Brooks