Terry Bradshaw, Bailee Madison, Chris Isaak

Jonah Hill, Chris Paul, Il Volo

Thomas Haden Church, "Turtle Man" Ernie Brown Jr., Johnny Mathis

Charles Barkley, Berenice Bejo, Amber Riley

Sandra Bullock, Diablo Cody, Pink Martini

Rep. Ron Paul, Joe Rogan, Mario Joyner

Al Michaels & Cris Collinsworth, Elle Fanning, Robin Thicke

Louis C.K., snowmobile jump with Levi Lavalle, Young the Giant

Dana Carvey, Jason Reitman, Lenny Kravitz

Charlize Theron, Kevin Hart, Foster the People

Bill O'Reilly, Jackie Evancho

Katie Couric, Chris D'Elia, Matisyahu

Lea Michele, Adam Carolla, Neil Diamond

Katherine Heigl, J.B. Smoove, Taio Cruz

Robert Downey Jr., Abigail Breslin, Alison Krauss & Union Station

Hilary Swank, Mike "The Situation" Sorrentino, Dia Frampton

Melissa McCarthy, Gov. Rick Perry, T-Pain

Bill Cosby, Raini Rodriguez, Iron & Wine

Kathy Bates, Jay Mohr, Switchfoot

Kirstie Alley, Damon Wayans Jr., She & Him

Whitney Cummings, Dwight Howard, Gloriana

Julie Scardina, Dane Cook, Hot Chelle Rae

Dennis Miller, David & Sean La Vau, Javier Colon

Jim Parsons, Meghan McCain, Tom Morello with Ben Harper

Jimmy Fallon, Drew Brees, Gym Class Heroes

Robin Williams, Drew Hastings, Vince Gill

Howie Mandel, Nicole "Snooki" Polizzi, Patrick Stump

Amy Adams, Rocket City Rednecks, Miranda Lambert

Eric Stonestreet, J.R. Martinez, Nicole Scherzinger

Whitney Cummings, Chris Matthews, Il Divo

Kelsey Grammer, Sarah Hyland, Andrea Bocelli

Jason Segel, Kris Jenner, Lyle Lovett

Ellen Barkin, Henry Cavill, Cirque du Soleil "Iris"

Miss Piggy, Mickey Rourke, Mute Math

Kristen Stewart, Dave Attell, Joe Jonas

Taylor Lautner, Martha Stewart, Daughtry

Eddie Murphy, "Turtle Man" Ernie Brown Jr., Robyn

Justin Bieber, David Freese, Lloyd

Adam Sandler, Rob Kardashian, Awolnation

Chelsea Handler, Drew Manning, the Original 7ven

Amanda Seyfried, John Cho & Kal Penn, Kathleen Madigan

President Barack Obama, Yo-Yo Ma and Friends

Jonah Hill, Paula Deen, Chris Isaak

Terry Bradshaw, Rowan Atkinson, Game

Zachary Levi, Barry Rothbart, Gloria Estefan

Zooey Deschanel, J.R. Martinez, Fountains of Wayne

Julie Bowen, Dave Salmoni, Imelda May

Aaron Eckhart, Julianne Hough, Amos Lee

David Arquette, Darrell & Brandon Sheets, Puddle of Mudd

Jack Black, Steve Martin, Owen Wilson, Aubrey Plaza, Blondie

Tim Allen, Theresa Caputo, Scotty McCreery

Kim Kardashian, Kris Humphries, Kenny Wormald, LeAnn Rimes

Evangeline Lilly, Magic Johnson, Jo Koy

Hugh Laurie, Herman Cain, the Airborne Toxic Event

Albert Brooks, Chaz Bono, TV on the Radio

Ed Helms, Deena Nicole Coretese, Lisa Hannigan

Lauren Graham, Seth MacFarlane

Ryan Gosling, Pauley Perrette, Arctic Monkeys

Hugh Jackman, Maya Rudolph, Tony Bennett

Jamie Foxx, Michelle Monaghan, Bush

Amy Poehler, Joseph Gordon-Levitt, the Kooks

Gerard Butler, Whitney Cummings, Kelly Clarkson

Simon Cowell, Natasha Leggero, Selena Gomez

Jason Statham, Michele Bachmann, Lady Antebellum

Charlie Sheen, Kevin Hart, LMFAO

Jane Lynch, Demetri Martin, Needtobreathe

Ellen DeGeneres, Bob Harper, Cobra Starship

Christina Applegate, Paul "DJ Pauly D" Delvecchio, Glen Campbell

Bill Maher, Octavia Spencer, Alice Cooper

Will Arnett, Anna Kendrick, Tinie Tempah

Kristin Chenoweth, Chris Colfer

Wanda Sykes, Nick Swardson, Roger Daltrey

Dick Cheney, Carrot Top, Andy Grammer

Heidi Klum, Kevin Smith, Fitz and the Tantrums

Allison Janney, Jay Mohr, OK Go

Jeff Bridges, Nicole "Snooki" Polizzi

Julie Scardina and animals, David Koechner, Cake

Jane Fonda, Elizabeth Banks, Mana

Sam Worthington, Bailee Madison, The Game

Joel McHale, Viola Davis, Ximena Sarinana

Jesse Eisenberg, Mike "The Situation" Sorrentino, Cage the Elephant

Gordon Ramsay, Bryce Dallas Howard, Panic! at the Disco

Dennis Miller, Dennis Rodman, Rye Rye featuring Robyn

Roseanne Barr, Jason Momoa, Lykke Li

Jeremy Piven, Kelly Osbourne, Mariachi El Bronx

Katie Holmes, Novak Djokovic, Mat Kearney

Ryan Reynolds, Sheryl Crow, Matt Nathanson

Gillian Anderson, Aziz Ansari, Kelly Rowland

Matt LeBlanc, Freida Pinto, Stevie Nicks

Chris Tucker, Skipper Bivins & Trent Jackson, Vanessa Carlton

Shaun White, Olivia Wilde, Train

Jessica Alba, Sue Johanson, Gomez

Dolly Parton, Ben Bailey

Emma Stone, Adam Carolla, Rickey Minor, Grace Potter, Charles Bradley, Sharon Jones, the Youth Orchestra of L.A.

Daniel Craig, Anthony Robles, Gavin DeGraw

Jenna Fischer, Cloris Leachman, 3 Doors Down

Neil Patrick Harris, Buddy Valastro, Imelda May

Bryan Cranston, Nancy Grace, Shaggy

Don Rickles, Bristol Palin, Colbie Caillat

Craig Ferguson, Rose Byrne, David Cook

Seth Meyers, Marjorie Johnson, Barry Manilow

Howie Mandel, David Feherty, Joss Stone

Kathie Lee Gifford, Hoda Kotb, Sig Hansen, Ashton Shepherd

Kevin James, Ali Wong, "The Voice" winner Javier Colon

Julie Scardina, Mary Louis Parker, Billy Ray Cyrus

Lisa Kudrow, Billy Gardell, Natasha Bedingfield

Owen Wilson, Tom Papa, Plain White T's

Justin Timberlake, Kevin Hart, the Antlers

Louis C.K., Richard Engel, Raphael Saadiq

Rosario Dawson, Marc Anthony, Jackie Evancho

Larry the Cable Guy, Dorothy Custer, LMFAO

Josh Duhamel, Jay Mohr, Jill Scott

Larry David, "Bachelorette" Ashley Hebert, Pitbull with Ne-Yo

Blake Lively, Blake Shelton, Scotty McCreery

Kim Kardashian, Lior Suchard, Randy Travis with Josh Turner

Jason Sudeikis, Adam Levine, Ziggy Marley

Bill Cosby, Kris & Bruce Jenner, Neon Trees

Jim Carrey, Selena Gomez, Tinie Tempah

Jada Pinkett Smith, Elle Fanning, Lenka

Kevin Bacon, Bethenny Frankel, OneRepublic

Katie Couric, Cee-Lo Green

Paris Hilton, Dhani Jones, INXS with Pat Monahan

Piers Morgan, Rico Rodriguez, Scott Weiland

Chaz Bono, Brady Barr, Foster the People

Meredith Vieira, Demetri Martin, Ben Harper

Dustin Hoffman, Meghan McCain, the Script

Kirstie Alley, Erik Rivera, Il Volo

Jack Black, Mike Huckabee, Parachute

Ed Helms, Chelsea Kane, Iron & Wine

Ryan Seacrest, Jordana Brewster, TV on the Radio

Eva Mendes, storm chaser Reed Timmer, Tedeschi Trucks Band

Jodie Foster, Ken Jeong, Rodrigo y Gabriela

Ann Curry, Hines Ward, the Kills

Dick Van Dyke, Khloe Kardashian & Lamar Odom, Steve Earle

Julie Scardina, Ginnifer Goodwin, Def Leppard

Jennifer Lopez, Jesse Tyler Ferguson, BC Jean

Steven Tyler, Aubrey Plaza, the Civil Wars

Wanda Sykes, Ralph Macchio, Priscilla Ahn

Kate Hudson, Chris Hemsworth, Sergio Mendes with Siedah Garrett

Penelope Cruz, Nick Thune, Ricky Martin

Paul Walker, Donny & Marie Osmond

Rob Lowe, Susan Lucci, Moby

Chelsea Handler, Judd Apatow, OK Go

Rene Russo, Kevin Hart, Buddy Guy

Lindsay Lohan, Jillian Michaels, the Airborne Toxic Event

Christina Aguilera, Paul Reiser, Alison Krauss & Union Station featuring Jerry Douglas

John Travolta, Leslie Mann, Eliza Doolittle

Tyler Perry, Kendra Wilkinson, Bright Eyes

Diane Lane, Chris Jericho, Jessie J

Kristen Bell, Austin "Chumlee" Russell, Sara Evans

Jamie Foxx, Jesse Heiman, k.d. lang

David Arquette, Ben Bailey, Far East Movement

Emma Roberts, Gary Busey, Jeff Beck with Imelda May

Matthew Morrison, Carrie Underwood

Dwayne Johnson, Bethany Hamilton, Fitz & the Tantrums

Tracy Morgan, Neve Campbell, Augustana

Vin Diesel, Ashley Tisdale, Scissor Sisters

Kourtney & Kim Kardashian, Fareed Zakaria, Mary Mary

Helen Hunt, Sammy Hagar, Good Charlotte

Howie Mandel, Zachary Gordon, Dierks Bentley

Russell Brand, Lorraine Nicholson, Los Lonely Boys

Jennifer Hudson, William H. Macy

Kirstie Alley, UFC Fighter Jon "Bones" Jones, Peter, Bjorn & John

Carol Burnett, Jason Ritter, Keith Urban

Julie Scardina, Rebecca Black, Duran Duran

Zachary Levi, Lisa Lampanelli, Raphael Saadiq

Robert Pattinson, Whitney Cummings, Alice Cooper

Rainn Wilson, "Epic Meal Time" with Harley Morenstein & Sterling Toth, Serj Tankian

Matthew McConaughey, Rizwan Manji, Michael Kosta

Wanda Sykes, Simon Pegg, Juanes

Jane Lynch, Chris Matthews, Avril Lavigne

Aaron Eckhart, Christie Brinkley, Thompson Square

Jerry Seinfeld, Bailee Madison, Darlene Love

Simon Cowell, Jeff Gordon, Travis Barker

Matt Damon, Betty White, Cake

Christina Appelgate, John Fulton, Michael Franti

Emily Blunt, Jackson Murphy, Chris Medina

Meredith Vieira, DJ Pauly D, Hanson

Randy Jackson, Nick Swardson, Travie McCoy

Owen Wilson, Rachel Maddow, Anberlin

Mark Harmon, Dwight Howard, 30 Seconds to Mars

Jenna Fischer, Abigail Breslin, Miguel

Charles Barkley, Jenni "JWoww" Farley, Red

Liam Neeson, Dave Salmoni, Gretchen Wilson

Lady Gaga, Sofia Vergara, John Legend

Kathy Griffin, Gayle King, the Black Keys

Rob Lowe, Amber Riley, Nicki Minaj

Matt LeBlanc, Clay Matthews, Ricky Martin

Javier Bardem, Paula Abdul, Merle Haggard

Mark Wahlberg, Lachlan Patterson, James Blunt

Hugh Laurie, Hailee Steinfeld, Finesse Mitchell

Jeff Bridges, Dianna Agron, Bobby Long

Jesse Eisenberg, Jennifer Lawrence, Ryan Bingham

Helena Bonham Carter, Timothy Olyphant, One eskimO

Adam Sandler, Larry the Cable Guy, Esperanza Spalding

Justin Bieber, Jay Mohr, the Band Perry

Kathy Bates, Brad Womack, Billy Currington

Annette Bening, Frank Caliendo, Amos Lee

Jason Statham, Melissa McCarthy, White Lies

Dana Carvey, Maggie Q, Lizz Wright

Kathie Lee Gifford & Hoda Kotb, Armie Hammer, Hayes Carll

Ben Affleck, the Decemberists

Amy Poehler, Mike "The Situation" Sorrentino, Grace Potter & the Nocturnals

Ashton Kutcher, Aubrey Plaza, Neon Trees

Gordan Ramsay, Kathleen Madigan, Maroon 5

Michael Douglas, Julie Scardina, Randy Rogers Band

Cameron Diaz, Eric Stonestreet, the Civil Wars

Seth Rogen, Brady Barr, Bettye Lavette

Bill Maher, Cam Newton, the Duke Spirit

Randy Jackson, Jennifer Lopez, Ryan Seacrest, Steven Tyler, Dan Ahdoot, Diane Birch

Jim Parsons, Hailee Steinfeld, Lukas Nelson

Hilary Swank, Jesse Eisenberg, Los Lobos

Jamie Foxx, Leighton Meester

Queen Latifah, Gustavo Dudamel, Jazmine Sullivan

Ron Howard, Nicole "Snooki" Polizzi, Sick Puppies