Michael Strahan, Marjorie Johnson, Leona Lewis

Sylvestor Stallone, Judd Apatow, Libera

Christina Applegate, Kevin Nealon, "The Voice" winner Tessanne Chin

Olivia Wilde, Julie Scardina, Johnny Mathis

Meredith Vieira, JB Smoove, Jake Bugg

Carson Daly, Justin Willman, Billy Ray Cyrus

Kevin Hart, Brooklyn Decker, Chris Young

Tyler Perry, Ken Jeong, the Head and the Heart

Kirstie Alley, Ernie Brown Jr., Switchfoot

Simon Cowell, Megyn Kelly, MS MR

Christina Aguilera, Jay Mohr

Garth Brooks, Jim Edds

Quentin Tarantino, Jim Stacy, Luke Bryan

Bette Midler, Michael Buble

Jim Parsons, John Downer, Cassadee Pope

Kristen Bell, David Gregory, Julian Lennon

Blake Shelton, Kathie Lee Gifford, Hoda Kotb, Imelda May

George W. Bush, Bil Dwyer, Ben Harper with Charlie Musselwhite

Whoopi Goldberg, Anthony Jeselnik, TOTEM from Cirque de Soleil

Bill O'Reilly, Guy Fieri, Lee Brice

Craig Ferguson, Jaimie Alexander, JRand featuring Flo Rida

Bill Cosby, Chris Pratt, Gary Allan

Matt Lauer, Carrot Top, Cults

Casey Affleck, Kelly Clarkson, Lyle Lovett

Mariska Hargitay, Sen. Ted Cruz, Gavin DeGraw

Andy Samberg, Bailee Madison, Goo Goo Dolls

Ellen DeGeneres, Bill Engvall, Tired Pony

Liam Hemsworth, Jayma Mays, the Rides featuring Stephen Stills & Kenny Wayne Shepherd

Anthony Hopkins, Sting

Melissa McCarthy, Andy Cohen, Empire of the Sun

Matthew McConaughey, Eli Roth, the Fray

Kim Kardashian, Abigail Breslin, Two Door Cinema Club

Savannah Guthrie, Mark Cuban, Kodaline

Adam Levine, Ali Wentworth, Steve Nieve with Elvis Costello

Wanda Sykes, Richard Engel, Scotty McCreery

Emma Roberts, Dave Salmoni, Diane Birch

Harrison Ford, Piers Morgan, Daughtry

Kristin Chenoweth, Ross Matthews, Joan Jett and the Blackhearts

Michael Douglas, Larry the Cable Guy, Thomas Rhett

Rosie Perez, Tenacious D

Lauren Graham, Chris Matthews, Tom Odell

Whitney Cummings, Ann Romney, Lissie

Billy Crystal, Nicole "Snooki" Polizzi, Jenni "JWoww" Farley, Toni Braxton, Kenny "Babyface" Edmonds

Drew Barrymore, D.L. Hughley, the Avett Brothers

Terry Bradshaw, Nelly

Julianne Moore, Billy Gardell, Stone Temple Pilots with Chester Bennington

Kathy Griffin, Newt Gingrich, Demi Lovato

Joseph Gordon-Levitt, Jay Mohr, Mika featuring Ariana Grande

Magic Johnson, Marjorie Johnson, Gary Clark Jr.

Sandra Bullock, Key & Peele, Gregory Porter

Julia Louis-Dreyfus, Ron Paul, Little Big Town

Dana Carvey, Cee-Lo Green, Goodie Mob

Olivia Wilde, Adam Scott, Cher Lloyd

Justin Timberlake, Paula Patton

Jimmy Fallon, Lior Suchard, Billy Currington

Tim Allen, Dwayne Wade, Fitz & the Tantrums

Christina Aguilera, Joy Behar, Valerie June

Neil Patrick Harris, Demi Lovato, Five for Fighting

Chris Hemsworth, Kristen Schaal, Sheryl Crow

Zooey Deschanel, Terry Crews, Buena Vista Social Club

Hugh Jackman, Aisha Tyler, OneRepublic

Charlie Sheen, Jim Rome, Trombone Shorty

Rose Byrne, Donny Deutsch, Jennifer Nettles

Martin Short, Meghan McCain, Backstreet Boys

Simon Cowell, Adam Carolla, American Authors

Vince Vaughn, Olivia Munn, Vintage Trouble

Christina Applegate, Rob Corddry, White Lies

Bill Maher, Victoria Duval, ZZ Ward

Sen. John McCain, Diablo Cody, Booker T. Jones with Mayer Hawthorne

Julie Scardina, Rod Stewart

Matt LeBlanc, Natasha Leggero, Sky Blu

Josh Duhamel, J.B. Smoove, Macklemore & Ryan Lewis

Jeff Daniels, Sherri Shepherd, Quinn Sullivan

Jason Sudeikis, Jim Stacy, K.T. Tunstall

Robin Williams, Mark Cuban, Gavin DeGraw

Matt Damon, Anna Faris, Parachute

President Barack Obama, Patti LaBelle

Bryan Cranston, Karolina Kurkova, Amos Lee

Meredith Vieira, Jim Norton, Charlie Worsham

Casey Affleck, Allison Janney, Sammy Hagar

Kate Hudson, Bob Costas, Kopecky Family Band

Kristin Chenoweth, Josh Gad

Kristen Bell, Jake Johnson, Phillip Phillips

Katy Perry, Cris Collinsworth, Kacey Musgraves

Cate Blanchett, Michael B. Jordan, Court Yard Hounds

Ashton Kutcher, Jayma Mays, Hiatus Kaiyote

Aaron Paul, Selena Gomez

Gillian Anderson, Jim Rash & Nat Faxon, Kenny Chesney

Howie Mandel, Marisa Miller, Sara Bareilles

Anthony Hopkins, Amy Schumer, Robert Randolph and the Family Band

Jane Lynch, Charlie Hunnam, Serena Ryder

Zachary Levi, Danica Patrick, Talib Kweli featuring Nelly & Abby Dobson

Savannah Guthrie, Anthony Jeselnik, Johnnyswim

Bill Hader, Eliot Spitzer, Passenger

Helen Mirren, Ben Schwartz, the Olms

John Malkovich, Olivia Munn, Blackberry Smoke

Dane Cook, Nev Schulman, Matt Nathanson

Charlie Day, Jeffrey Dean Morgan, Lionel Richie

Wanda Sykes, Kris Jenner, India.Arie

David Spade, Joey King, Grace Potter & the Nocturnals

Whitney Cummings, Alex Minsky, John Fogerty

Sandra Bullock, Bob Saget, Il Volo

Steve Carell, Ken Ilgunas, Barenaked Ladies

Terry Bradshaw, Steve Byrne, Joseph Arthur

Kristin Davis, Harvey Fierstein, the Mowgli's

David Gregory, "The Voice" winner Danielle Bradbery

Kathy Griffin, Billy Gardell, Grouplove

Billy Crystal, Pitbull

Armie Hammer, Dave Salmoni, Boxer Rebellion

Carson Daly, Betty White, Timeflies

Kevin Hart, Jeremy Scahill, Trace Adkins & Colbie Caillat

Jamie Foxx, Jimmy Connors, Matthew Morrison

Kevin Bacon, Mel B, Bad Company

Russell Crowe, Judith Hill

Henry Cavill, Jessica Buchanan & Erik Landemalm, She & Him

Danny McBride, Khloe Kardashian Odom, the Wanted

Owen Wilson, Wayde King & Brett Raymer, LeAnn Rimes

Vince Vaughn, Kathleen Madigan, Scotty McCreery

Howie Mandel, Sal Basille & Francis Garcia, Sigur Ros

Tyler Perry, Isla Fisher, Shout Out Louds

Vin Diesel, Jeff Foxworthy, the Lone Bellow

Eric Stonestreet, Jeremy Wade, Thompson Square

Bradley Cooper, Heidi Klum, The-Dream & Kelly Rowland

Mitt Romney, "American Idol" winner Candice Glover

Adam Sandler, Phil Jackson, Family of the Year

Usher, Nick Offerman, Pyramids

Wanda Sykes, Martha Stewart, Drop City Yacht Club

Miranda Lambert, Ross Matthews, Pistol Annies

Aaron Eckhart, Sherri Shepherd, 98 Degrees

Shakira, Marc Maron, Tom Jones

Craig Ferguson, Connie Sawyer, Emeli Sande

Lauren Graham, Ken Jeong, Patty Griffin

Magic Johnson, Savannah Guthrie, Fall Out Boy

Chris Evans, Kevin Smith, Various Cruelties

Matt Lauer, Jen Kirkman, AWOLNATION

Kathy Griffin, Eli Roth, Cheap Trick

Cher & Georgia Holt, Dov Davidoff, Florida Georgia Line

Ben Kingsley, Larry the Cable Guy, the Band Perry

Robert Downey Jr., Chadwick Boseman, Avril Lavigne

Gwyneth Paltrow, JB Smoove, Billy Ray Cyrus

Tom Cruise, Emily Blunt, Black Rebel Motorcycle Club

Carol Burnett, Stephen Amell, Plain White T's

Diane Keaton, Trevor Moore, Jake Bugg

Adam Levine, Cyndi Lauper, the Airborne Toxic Event

LL Cool J, Andy Cohen, Tegan and Sara

Charlie Sheen, Andy Enfield, Brad Paisley

Rebel Wilson, Jackson Galaxy, Hanson

Julia Louis-Dreyfus, Anthony Jeselnik, Vintage Trouble

Julie Scardina, Demetri Martin, Gin Wigmore

Eva Longoria, Terry Crews, Cavalia's Odysseo

Rosario Dawson, Max Greenfield, Gloriana

Blake Shelton, Jim Rome

Matthew Perry, Kristen Schaal, Goo Goo Dollls

Kim Kardashian, Willie Geist, Imagine Dragons

Kristin Chenoweth, Justin Willman, Josh Groban

Keith Urban, Paula Deen, Django Django

Gerard Butler, Keegan-Michael Key & Jordan Peele, Crystal Bowersox

Don Cheadle, Wynonna Judd, Wiz Khalifa featuring Akon

Dwayne Johnson, Chris Paul, Atlas Genius

Vanessa Hudgens, Chris O'Dowd, Gary Clark Jr.

Jenna Fischer, Dennis Rodman, Black Prairie

Morgan Freeman, Rulon Gardner & Henry Cejuda, James Hunter

Craig Ferguson, Vera Farmiga, Harper Simon

James Franco, Jay Mohr, Owl City with Yuna

Jerry Seinfeld, Mark Cuban, Jose James

Olivia Wilde, Nick Offerman, Buddy Guy and the Experience Hendrix All-Star Band

Halle Berry, Rachel Maddow, Ashley Monroe

Bill O'Reilly, Abigail Breslin, the Mavericks

Steve Carell, Joey King, Shooter Jennings

David Duchovny, J.B. Smoove, Father John Misty

Colin Farrell, Naomi Campbell, Boz Scaggs

Russell Crowe, Eli Roth, Robert Randolph with the Slide Brothers

Meredith Vieira, Richard Roeper, thenewno2

Arsenio Hall, Karolina Kurkova, Tristan Prettyman

Chelsea Handler, Edythe Kirchmaier, Sky Blu

Robin Wright, Bonnie Raitt

Kevin Bacon, Dennis Rodman, Kevin Eubanks

Kathy Griffin, David Feherty, FM Radio

Jarod Miller, Colbie Caillat, Gavin DeGraw

Anne Hathaway, Lester Holt, Eli Young Band

Charles Barkley, Bob Fisher, Jewel

James Spader, Lior Suchard, Far East Movement

Seth MacFarlane, Jenna Elfman, Norah Jones

Amy Adams, Adam Carolla, Hunter Hayes

Tim McGraw, Bar Refaeli

Josh Duhamel, Kathryn Bigelow, Lianne La Havas

Hugh Jackman, Jessica Chastain, Michael Bolton

Wanda Sykes, Tyler Hamilton, Branford Marsalis

Piers Morgan, Quvenzhane Wallis, Benh Zeitlin, Lisa Loeb

Charlie Sheen, David O. Russell, Holly Williams

Whitney Cummings, Jackie Weaver, Aaron Neville

Catherine Zeta-Jones, Donny Deutsch, Lady Antebellum

Robert DeNiro, Sherri Shepherd, the Grascals

Dustin Hoffman, Jillian Michaels, Kenny Loggins and Blue Sky Riders

Heidi Klum, Seann Willam Scott, Gary Allan

Dana Carvey, Emmy Rossum, Ben Harper with Charlie Musselwhite

Chris Tucker, Bob Costas, Big Boi

Chelsea Handler, Bob Costas, Sharon Jones & the Dap-Kings

Mark Harmon, Kristin Chenoweth

Vanessa Hudgens, Joy Behar

Matt Damon, Larry the Cable Guy

Jennifer Lopez, Aaron Eckhart, Dorian Holley

Ben Affleck, Kristen Bell, Rodriguez

Kevin Bacon, Sherri Shepherd, Mary Lambert

Leslie Mann, David Koechner

Steve Carell, Kathryn Hahn, Jake Clemons

Mark Wahlberg, Jeff Foxworthy, Salaam Remi featuring Akon

Louis C.K., Sen. John McCain, Meghan McCain, Plain White T's

Courteney Cox, Joy Behar, Youngblood Hawke

Arnold Schwarzenegger, Chumlee & Rick Harrison, Ziggy Marley

Kevin Hart, Betty White, Dwight Yoakam