Christina Ricci, Mike 'The Situation' Sorrentino, Paul 'DJ Pauly D' DelVecchio, Vinny Guadagnino, Ronnie Ortiz-Magro, Mariachi El Bronx

Kelsey Grammer, Octavia Spencer, Lloyd

Tracy Morgan, Chris Paul, tUnE-yArDs

Don Cheadle, David Cross, Boyz II Men

Channing Tatum, Ben Flajnik, Uh Huh Her

Randy Jackson, Dermot Mulroney, Will Hoge

Woody Harrelson, Yvonne Strahovski, Rodney Atkins

Meryl Streep, Stephen Merchant, Kina Grannis

Katherine Heigl, Ne-Yo, Grouplove

Will Arnett, Madeleine Stowe, Dana Gould

Tom Arnold, Keke Palmer, Filter

Terrence Howard, Thomas Horn, Safetysuit

Kiefer Sutherland, Bear Grylls, Young the Giant

Elizabeth Banks, Ben McKenzie, Mindless Behavior

Cuba Gooding Jr., Sara Hyland, Big Freedia

Andre Agassi, J.B. Smoove, Seal

Kate Walsh, Marc Maron, Fishbone

Martin Scorsese, Kenneth Branagh, Angels and Airwaves

John Krasinski, Eloise Mumford, Gotye

Gary Oldman, Tim Heidecker & Eric Wareheim, Korn

Michelle Williams, Angela 'Big Ang' Raiola, Pitbull

Antonio Banderas, Damon Wayans Jr., 50 Cent

Nathan Fillion, Josh Hutcherson, Far East Movement

Courteney Cox, Mario Manningham & Ahmad Bradshaw, Tony Bennett

Jeff Goldblum, David Alan Grier, Lana Del Rey

John Goodman, Kevin Nealon, Robin Thicke

Sean 'Diddy' Combs, 'Science Bob' Pflugfelder, Miley Cyrus

Chris Pine, Khloe Kardashian Odom, Puscifer

Eric Stonestreet, Kate Upton, Jake Owen

Jessica Alba, Rep. Barney Frank, Nathan Myhrvold, Tower of Power

Joel McHale, Justin Theroux, Die Antwoord

After the Oscars Special

Steven Tyler, Harvey Weinstein, Melanie Fiona

Maria Menounos; Mat Kearney

Ed Helms, Leslie Bibb, Wallpaper

Joan Rivers, Nicki Minaj

Dr. Phil McGraw; “The Bachelor” runner-up Lindzi Cox; Keane

Will Ferrell; actress Ellie Kemper; Allen Stone

Jonah Hill; Busy Philipps; The Crystal Method feat. Martha Reeves

Channing Tatum; actor Genesis Rodriguez

Jessica Simpson; Gael García Bernal

Kristen Bell; actor Ice Cube; KISS performs

Don Rickles; Amanda de Cadenet; Dr. Teeth and the Electric Mayhem

Kristin Chenoweth; racecar driver Jimmie Johnson; Neon Trees

Zooey Deschanel; actor Steven Seagal; Shinedown

Ashton Kutcher and Justin Bieber; All-American Rejects

Adam Carolla; professional basketball player Kevin Durant; White Rabbits

Carson Daly; actress Kristen Schaal

Seann William Scott; actress Christa Miller; Eli Young Band

Edie Falco; Amy Schumer

Jason Biggs; Lionel Richie and Billy Currington

Anthony Davis; actress Lena Headey; NeedToBreathe

LL Cool J; actor James Van Der Beek; Josh Baze

David Spade; Slash feat. Myles Kennedy

Ashley Judd; director Bobcat Goldthwait; The Civil Wars

Danny McBride; actress Dianna Agron; The Shins

Zac Efron; actress Krysten Ritter; Noel Gallagher

Mark Harmon; Dancing With the Stars castoff; Ashanti performs

Jennifer Love Hewitt; Chef Georgia Pellegrini; Jason Mraz

Gabourey Sidibe; Morgan Spurlock; Kasabian

Julia Louis-Dreyfus; Andy Hoang & Erik Salgado; The Hives

John Cusack; Vintage Trouble

Sharon Osbourne; Max Greenfield; LP

Emily Blunt; Dave Salmoni; Adam Lambert

Vanessa Williams; Jonny Lee Miller; Andrew Bird

David Arquette; Civil Twilight

William H. Macy; Eva Green; Brad

Scarlett Johansson; Roger Daltrey

Kristen Stewart; Chloë Grace Moretz; B.o.B.

Johnny Depp; Casey Wilson; Silversun Pickups

Steve Harvey; Dev Patel; Glenn Frey

Dr. Phil McGraw; Carrie Underwood

Drew Carey; Rita Wilson

Matthew Morrison; Beth Stern; Delta Spirit

Kristin Bell; Dax Shepard; Jason Mantzoukas; The Cult

Kathy Griffin; Emily Maynard; Gavin DeGraw

Patricia Heaton; Nikolaj Coster-Waldau; Lisa Marie Presley

Josh Brolin; Bethenny Frankel; Kimbra

Charlize Theron; Manny Pacquiao; Graffiti6

Christina Ricci; Chef Adam Perry; fun.

Andy Samberg; Edward Sharpe and the Magnetic Zeros

Kim Kardashian, Kourtney Kardashian and Khloe Kardashian Odom; Adam Carolla; K'Naan

Edward Norton; Leighton Meester; Dead Sara

Martin Short; Cee Lo Green; Goodie Mob

Jada Pinkett Smith; Matt Kemp; The Temper Trap

Sally Field; Kevin Love; Waka Flocka Flame

Anderson Cooper; Scott Caan; Metric

Katy Perry; Alex Pettyfer; The Offspring

Louis C.K.; Zoe Kazan

Matt LeBlanc; Selma Blair; Linkin Park

Howie Mandel; Chris Bosh; Linkin Park

Paul Reubens; Dreama Walker; Marina and the Diamonds

Gary Oldman; Rob Riggle; The Dirty Heads

Wanda Sykes; Joel Kinnaman; Serj Tankian

Billy Crudup; Fred Willard; Grace Potter and the Nocturnals

Bryan Cranston; Larry King; Zac Brown Band

Russell Brand; Olivia Munn; Matisyahu

Kate Beckinsale; Chris Harrison; Rubblebucket

Charlie Sheen; Nicole 'Snooki' Polizzi; Huey Lewis & Joe Cocker

Ben Stiller; Emily Maynard; The Head and the Heart

Jeremy Renner; Aaron Paul; Nas

Colin Farrell; Rosemarie DeWitt; Trey Songz

Jessica Biel; Rick Ross

David Duchovny; Jeff Ross; Alabama Shakes

Joseph Gordon-Levitt; Rebel Wilson; Good Old War

Thomas Haden Church; Rick Bayless; JJAMZ

Jennifer Garner; Paul Scheer; The Fixx

Tom Arnold; Ashley Greene; The Wood Brothers

Gordon Ramsay; Jordin Sparks; Andy Grammer

Robert Pattinson; Rick & Corey Harrison; Poliça

Kyra Sedgwick; Nick Prueher & Joe Pickett; Josh Doyle

Jamie Foxx; Cat Deeley; Imagine Dragons

Bob Newhart; Kevin Hart; Miss Willie Brown

Matt Stone & Trey Parker; Adam Scott; Everclear

Lea Michele; Simon Bird; The Avett Brothers

Dr. Phil McGraw; Dakota Johnson; Rita Ora

Britney Spears & Simon Cowell; Slightly Stoopid

Terry Bradshaw; Dave Matthews

Matthew Perry; Josh Hamilton; Kreayshawn

Richard Gere; Josh Radnor

Julie Bowen; Nate Parker; The Afghan Whigs

Julianna Margulies; Jessie Tyler Ferguson; The Killers

Melanie Griffith; Kerry Washington; Alanis Morissette

Keanu Reeves; Ginnifer Goodwin; Green Day

Selena Gomez; Lenny Venito; Tony Bennett

Zooey Deschanel; Maggie Grace; Electric Approach

Ty Burrell; Chris Paul; Psy

Amy Poehler; Alan Arkin; Garbage

Zac Efron; Jack Black & Kyle Gass; Tenacious D

Ben Affleck; Demi Lovato; Ben Howard

Megan Mullally; Father John Misty

Will Arnett; Chris Elliott; Dwight Yoakam

Kevin James; Ezra Miller

Aziz Ansari; Alana “Honey Boo Boo” Thompson & June “Mama” Shannon; Josh Turner

Don Rickles; Dancing with the Stars Castoff; Miguel

Joel McHale; Joe Walsh

Matthew Fox; Emily VanCamp; Paul Weller

Russell Peters; Prince

Axl Rose; Ana Gasteyer; The Whigs

Michelle Obama; Halle Berry; Ciara

Kelly Ripa; Alicia Keys

Howard Stern; Tracy Morgan; Sharon Jones and the Dap-Kings

David Letterman; Vampire Weekend

Jon Stewart & Stephen Colbert; The Avett Brothers with the Brooklyn Philharmonic

Robert Pattinson; Chris Hardwick; Ben Folds Five

John Goodman; Hayden Panettiere; Machine Gun Kelly

Kirstie Alley; Dave Salmoni; Tyler Bryant & The Shakedown

Daniel Craig; Stephenie Meyer; Boys Like Girls

Jessica Lange; Adam Pally; Game feat. Tyga & Wiz Khalifa

Christina Applegate; Youngblood Hawk

Martin Short; Suraj Sharma; Ne-Yo

Mel Brooks; Jake Tapper; Jason Aldean

Eric Stonestreet; L.A. Reid; Aimee Mann & James Mercer

Two Dancing with the Stars Castoffs; Andy Allo

Tim Allen; Manny Pacquiao; Flo Rida

Ryan Seacrest; Erin Andrews; Soundgarden

Reba McEntire; Mike Tyson; Youngblood Future

Eric Bana; Damian Lewis; Wiz Khalifa

Ted Danson; Emilia Clarke; Larry g(EE)

Leslie Mann; Ted; Sarah Jaffe

John Krasinski; Mike Birbiglia; Atlas Genius

Zachary Knighton; Dan Deacon

Hugh Jackman; Jenna Fischer; 2 Chainz

Samuel L Jackson; Jersey Shore cast; Ed Sheeran

Eric Stonestreet; L.A. Reid; Aimee Mann and James Mercer

Jessica Lange; Adam Pally; Game featuring Tyga