Kathy Griffin, Sally Hawkins, Mike Birbiglia

Ron Howard, Jeffrey Dean Morgan, Gabe Dixon Band

Anne Hathaway, Jensen Ackles, Lenka

Michael Imperioli, Jason Mesnick, Zac Brown Band

Kiefer Sutherland, Malcolm Gladwell, David Cook

Mickey Rourke, Rowdy Roddy Piper, Michael Strahan, Morgan Murphy

Dustin Hoffman, jet pack pilot Eric Scott, Crooked X

Kevin James, Evan Rachel Wood, Delta Spirit

Sarah Silverman, Soulja Boy Tellem

Randy Jackson, Diablo Cody, Thriving Ivory

Brendan Fraser, Jonathan Goodwin, Blake Shelton

Tim Roth, Joan Rivers

Miranda Cosgrove, Eric McCormack, Boz Scaggs, Dov Davidoff

Adam Carolla, Brody Jenner, Disturbed

Andy Garcia, macaroni and cheese box collector Ian Golder, Kraak and Smaak

Kristen Bell, Carlos Bernard, Benji Hughes

John Cleese, Chris Ayres, the Bird and the Bee

Justin Long, Camilla Belle, Nick Kroll

Vanessa Minnillo, Morrissey

Teri Hatcher, Larry Wilmore, Jazmine Sullivan

Amy Brenneman, Steve-O, the Little Ones

Andy Dick, Grant Show, the Red Jumpsuit Apparatus

Demetri Martin, Marisa Tomei, Mishka, a special appearance by Matthew McConaughey

Johnny Knoxville, Trisha Helfer, Mark Seliger

Tyler Perry, Blues Traveler

Naomi Watts, Whitney Port, K'Naan

Rosie Perez, Danny McBride, Anya Marina

Dev Patel, Robin Roberts, Kinky

The Jonas Brothers, Jimmie Johnson, Darius Rucker

Don Rickles, Ben Sollee

Rob Lowe, Khloe Kardashian, Living Things

Calista Flockhart, John Michael Higgins, Nick DiPaolo

Evangeline Lilly, Jason Mesnick, New Kids on the Block

Charles Gibson, Lil' Wayne, Robyn

Bonnie Hunt, Nathan Fillion, Oren Lavie

Kate Walsh, Carla Gugino, Raphael Saadiq

Heidi Klum, Bryan Cranston, Chris Cornell

Jaime Pressly, animal trainer Kirstin McMillan, the Pretenders

David Hasselhoff, Eliza Dushku, Pendulum

Kristin Stewart, Dwayne Johnson, the Dream

"Dancing with the Stars" castoff Belinda Carlisle, Chandra Wilson, Streeter Seidell and Amir Blumenfeld, Young Dubliners

Andy Samberg, Ashley Scott, MSTRKRFT

John Cena, Christopher Mintz-Plasse, the Duke Spirit

Portia de Rossi, Melissa Rycroft, Motley Crue

"Dancing with the Stars" castoff Denise Richards, Zach Braff, Cheryl Hines, Charlie Wilson sits in with the band

John Stamos, Dr. Drew Pinsky, Blue October

Ozzy, Sharon, Jack and Kelly Osbourne, Bobby Cannavale, Todd Glass

Paul Giamatti, Jim Gaffigan, Keri Hilson featuring Lil Wayne

"Dancing with the Stars" castoffs Steve Wozniak and Holly Madison, Will Arnett, Michelle Rodriguez

Amy Poehler, Jordana Brewster, Les Claypool

Vin Diesel, Anna Faris, Eli Young Band

Ben Affleck, Lily Allen

Jorge Garcia, David Alan Grier, "Dancing with the Stars" castoff Steve-O, Mims

Christina Applegate, Mike Tyson, Dana Gould

Zac Efron, Patti Stanger, Franz Ferdinand

Six-year-old genius Pranav Veera, Pete Yorn

Billy Bob Thornton, "Dancing with the Stars" castoff Lawrence Taylor

Justin Timberlake, Eliza Coupe, the Whip

Channing Tatum, Elisha Cuthbert, Depeche Mode

Jamie Foxx, Elizabeth Mitchell

Michael J. Fox, "Dancing With the Stars" castoff Chuck Wicks, Asher Roth

Dominic Monaghan, J.J. Abrams, Bang Camaro

Brooke Shields, Balthazar Getty, Kumail Nanjiani

Matthew McConaughey, Kara DioGuardi, Jason Aldean

Zachary Quinto, "Dancing With the Stars" castoff Lil' Kim, 11-year-old Scrabble champions Andy Hoang and Erik Salgado

David Spade, Zoe Saldana, Black Eyed Peas

Hugh Jackman, John Cho, Flo Rida

Chris Pine, Aziz Ansari, Scott Weiland

Paula Abdul, "Dancing With the Stars" castoff Ty Murray, Todd Glass

Matthew Fox, Benjamin McKenzie, Ciara

Adrien Brody, Steve "Lips" Kudlow and Robb Reiner, the Airborne Toxic Event

Eminem, Mike Tyson

Ben Stiller, Shawn Johnson and Mark Ballas, No Doubt

Tim Daly, Common, Busta Rhymes

Hank Azaria, Anton Yelchin, Eminem

Danny McBride, Nia Vardalos, Taking Back Sunday

Heather Graham, Lance Krall, Katie Melua

Thomas Haden Church, Ed Helms, 311

Paris Hilton, Ken Jeong, Blink 182

Artie Lange, Adam Perry Lang, No Doubt

Ty Pennington, David Sedaris, the Jonas Brothers

Roseanne Barr, Ryan Kwanten

Kathy Griffin, Ramon Rodriguez, Ben Harper

Kobe Bryant, Derek Fisher

David Arquette, Jill Wagner, Linkin Park

Josh Duhamel, Tracy Hutson, Bat For Lashes

Shia LaBeouf, June Diane Raphael, Eric Hutchinson

Megan Fox, David Cross, Phoenix

Samuel L. Jackson, Jamie-Lynn Sigler, Sean Patrick McGraw

Larry King, Marissa Miller, Chester French

Josh Lucas, Terrell Owens, Pitbull

Teri Hatcher, Danica Patrick, Daughtry

Seth Green, "Bachelorette" Jillian Harris, Zac Sunderland

Zooey Deschanel, Rev. Al Sharpton, Jewel

Katherine Heigl, David and Shaun Cassidy, La Roux

Tom Arnold, "Trailer Park Boys" Rob Wells, John Paul Tremblay and Mike Smith

Leslie Mann, Eric Winter, Parachute

Jonah Hill, Mary McCormack, Ryan Sheckler

Seth Rogen, Melissa Sagemiller, Jack's Mannequin

Anne Heche, Aubrey Plaza, Diane Birch

Ashton Kutcher, Nigel Lythgoe, the Script

Vanessa Hudgens, Eli Roth, Miike Snow

Sienna Miller, Dave Salmoni, Doug Benson

Quentin Tarantino, Rachel Nichols, pizza throwers Chris Green, Sam Niemeier, and Ryan Larose

Gordon Ramsay, Rob Zombie, Friendly Fires

Robin Williams, Bobcat Goldthwait, Matt & Kim

Shaquille O'Neal, Selena Gomez, Darius Rucker

Dylan McDermott, B.J. Novak, the Dead Weather

Kyra Sedgwick, Patton Oswalt, DataRock

Emile Hirsch, Amber Valletta, St. Vincent

Kathie Lee Gifford, Milo Ventimiglia, R. Kelly

Gerard Butler, Nate Berkus, Maxwell

Jennifer Connelly, Jeff Ross, Boys Like Girls

Kathy Griffin, Ryan Kwanten, Brendan Benson

Nick Cannon, Former Gov. Rod Blagojevich, White Lies

Julie Bowen, Rumer Willis, the Used

Eva Longoria Parker, Kelly Clarkson, a special appearance by Matt Damon and Joel McHale

David Alan Grier, 10-year-old vacuum cleaner expert Gregory Evans, Pink

Jenna Elfman, Danny Pudi, Lives of Famous Men, a special appearance by Rachael Ray

Christian Slater, Ed O'Neill, Sofia Vergara, Shakira

David Duchovny, Carmelo Anthony, Kid Cudi

Courteney Cox, Jessica Capshaw, "Dancing with The Stars" castoff Ashley Hamilton

Rob Lowe, Lisa Lampanelli, pizza throwers Chris Green, Sam Niemeier and Ryan Larose, a special appearance by Tommy Lasorda

LeBron James & his high school basketball teammates, Esther Dean, Chris Bianco

Ricky Gervais, "Dancing with the Stars" castoff Kathy Ireland, Alice in Chains

Rebecca Romijn, Joseph Fiennes, Alice in Chains

Hayden Panettiere, Matthew Rhys, Joss Stone

Woody Harrelson, Whitney Port, Shinedown

Patricia Heaton, Debi Mazar, Tom DeLay, Gossip

Joel McHale, Richard Belzer, KISS

Kelsey Grammer, Stana Katic, Motorhead

Michael Moore, Malin Ackerman, the Backstreet Boys

Jack Black, “Dancing with the Stars” castoff Chuck Liddell, Cobra Starship

Jamie Foxx, Toby Keith

Taye Diggs, Kristin Cavallari, Harper Simon

Serena Williams, Dr. Drew Pinsky, Eric Church

Edward Norton, Paul Shaffer, the latest "Dancing with the Stars" castoff, the Sounds

Salma Hayek, Rico Rodriguez, Dead by Sunrise

John C. Reilly, Nene Leakes, Kim Zolciak, an archery demonstration by Randy Oitker, the Temper Trap

Terry Bradshaw, Catherine Keener, Echo & the Bunnymen

Dr. Mehmet Oz, “Dancing with the Stars” castoffs Melissa Joan Hart & Louie Vito, Morningwood

James Marsden, Atticus Shaffer, Flyleaf

Jason Schwartzman, Rod Stewart

Paris Hilton, Slipknot

Pamela Anderson, “Dancing with the Stars” castoffs Mark Dacascos & Michael Irvin, Manny “Pac-Man” Pacquiao, White Rabbits

Joshua Jackson, Big Bird, Ghostface Killah featuring Raheem DeVaughn

Jesse Williams, Florence + the Machine

Ted Danson, Khloe Kardashian, Lamar Odom, Chickenfoot

Chris O'Donnell, Bill Simmons, “Dancing with the Stars” castoff Aaron Carter, Amerie

Dominic Monaghan, Holly Hibner & Mary Kelly, Los Lonely Boys

Danny DeVito, Streeter Seidell & Amir Blumenfeld, Switchfoot

Sean “Diddy” Combs, Super Dave Osborne, Huey Lewis & the News

John Stamos, Emily VanCamp, the latest "Dancing with the Stars" castoff, OneRepublic

John Stamos, Emily VanCamp, "Dancing with the Stars" castoff Joanna Krupa, OneRepublic

50 Cent, Marv Albert

Carrie Underwood, Heidi Montag & Spencer Pratt

Robert Pattinson, Kristen Stewart, Taylor Lautner, Death Cab for Cutie

Robert Pattinson, Kristen Stewart, Taylor Lautner, Death Cab for Cutie

Heidi Klum, Ron Artest, Weezer

Charlize Theron, Regis Philbin, "Dancing with the Stars" winner Donny Osmond, Wolfmother

Charles Barkley, Peter Facinelli, Leona Lewis

Magic Johnson, Kellan Lutz, Trey Songz

Matt Dillon, Nikki Reed, Birdman featuring Jay Sean

Jake Gyllenhaal, Ashley Greene, Honor Society

Don Rickles, Anika Noni Rose, Band of Skulls

Pee-wee Herman, Jackie, Tito & Marlon Jackson, Passion Pit

William Shatner, animal trainer Kristin McMillan, Jay Sean

Steven Seagal, Eddie Pepitone

Ray Romano, Kim Kardashian, the Mighty Mighty Bosstones

Zach Braff, Nigel Lythgoe, Michael McDonald

Ty Pennington, 8-year-old Chicken Whisperer Joshua McCarthy, Norah Jones

Rachel McAdams, Johnny Galecki, Allison Iraheta

Actress Rachel McAdams (Sherlock Holmes), Actor Johnny Galecki (The Big Bang Theory), musical guest Allison Iraheta

John Krasinski, James Cameron, Mary J. Blige