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

Director Martin Scorsese ("Hugo"); Kenneth Branagh ("My Week With Marilyn"). Also: Angels & Airwaves perform.

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

Oprah Winfrey; Musical Guest Coldplay

Steven Tyler, Harvey Weinstein, Melanie Fiona

Maria Menounos; Mat Kearney

“Dancing with the Stars” contestant Maria Menounos; musical guest 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

Actor/comedian Will Ferrell; actress Ellie Kemper; music from Allen Stone.

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

Channing Tatum; actor Genesis Rodriguez

Actor Channing Tatum; actress Genesis Rodriguez.

Jessica Simpson; Gael García Bernal

Actress Jessica Simpson; actor Gael García Bernal.

Kristen Bell; actor Ice Cube; KISS performs

Actress Kristen Bell; actor/musician Ice Cube; musical guests KISS.

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

Actress Zooey Deschanel; actor Steven Seagal; musical guests 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

Actress Julia Louis-Dreyfus; Scrabble champions Andy Hoang & Erik Salgado; musical guests 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

Actor/comedian Andy Samberg; National Spelling Bee Champion Snigdha Nandipati; musical guests Edward Sharpe & 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

Zac Efron (The Paper Boy), Jack Black, Kyle Glass, Musical Guest Tenacious D

Ben Affleck; Demi Lovato; Ben Howard

Ben Affleck (Argo), Demi Lovato (X Factor), Musical Guest Ben Howard

Megan Mullally; Father John Misty

Megan Mullally (Smashed), Drew Lachey, Anna Trebunskaya, Helio Castroneves, Chelsie Hightower, Musical Guest Father John Misty

Will Arnett; Chris Elliott; Dwight Yoakam

Will Arnett (Up All Night), Chris Elliot (The Guy Under the Sheets: The Unauthorized Autobiography), Musical Guest Dwight Yoakam

Kevin James; Ezra Miller

Kevin James (Here Comes the Boom), Ezra Miller (The Perks of Being a Wallflower)

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

Aziz Ansari (Parks and Recreation), Alana "Honey Boo Boo" Thompson and June "Mama" Shannon (Here Comes Honey Boo Boo), Musical Guest Josh Turner

Don Rickles; Dancing with the Stars Castoff; Miguel

Don Rickles (Performing at the Taj Mahal in Atlantic City), Dancing with the Stars Castoff, Musical Guest Miguel

Joel McHale; Joe Walsh

Joel McHale (Community), Joe Walsh, Musical Guest Joe Walsh

Matthew Fox; Emily VanCamp; Paul Weller

Matthew Fox (Alex Cross), Emily VanCamp (Revenge), Musical Guest Paul Weller

Russell Peters; Prince

Jerry O'Connell, Russell Peters, Musical Guest Prince

Axl Rose; Ana Gasteyer; The Whigs

Axl Rose (The Guns and Roses Residency), Ana Gasteyer (Suburgatory), Musical Guest The Whigs

Michelle Obama; Halle Berry; Ciara

First Lady Michelle Obama, Halle Berry (Cloud Atlas), Musical Guest Ciara

Kelly Ripa; Alicia Keys

Kelly Ripa (Live with Kelly and Michael), Musical Guest Alicia Keys

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

Howard Stern, Tracy Morgan, Musical Guest Sharon Jones & the Dap-Kings

David Letterman; Vampire Weekend

David Letterman ("Late Show with David Letterman"), Musical Guest Vampire Weekend.

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

Jon Stewart ("The Daily Show") & Stephen Colbert ("The Colbert Report"), Musical Guest The Avett Brothers with the Brooklyn Philharmonic.

Robert Pattinson; Chris Hardwick; Ben Folds Five

Robert Pattinson ("Twilight Saga: Breaking Dawn - Part 2"), Chris Hardwick ("Chris Hardwick: Mandroid"), Musical Guest Ben Folds Five.

John Goodman; Hayden Panettiere; Machine Gun Kelly

John Goodman ("Flight"), Hayden Penettiere ("Nashville"), Music Guest Machine Gun Kelly.

Kirstie Alley; Dave Salmoni; Tyler Bryant & The Shakedown

Kirstie Alley ("The Art of Men (I Prefer Mine Al Dente)"), Animal Trainer Dave Salmoni, Musical Guest Tyler Bryant & The Shakedown.

Daniel Craig; Stephenie Meyer; Boys Like Girls

Daniel Craig ("Sky Fall"), Stephenie Meyer ("Twilight Saga: Breaking Dawn - Part 2"), Musical Guest Boys Like Girls.

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

Jessica Lange ("American Horry Story"), Adam Pally ("Happy Endings"), Musical Guest Game feat. Tyga & Wiz Khalifa.

Christina Applegate; Youngblood Hawk

Christina Applegate ("Up All Night"), "Dancing with the Stars" Castoffs, Musical Guest Youngblood Hawk.

Martin Short; Suraj Sharma; Ne-Yo

Martin Short, Suraj Sharma ("Life of Pi"), Musical Guest Ne-Yo.

Mel Brooks; Jake Tapper; Jason Aldean

Mel Brooks, Jake Tapper ("The Outpost: An Untold Story of American Valor"), Musical Guest Jason Aldean.

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

Eric Stonestreet ("Modern Family"), L.A. Reid ("X Factor"), Muiscal Guests Aimee Mann & James Mercer.

Two Dancing with the Stars Castoffs; Andy Allo

Andy Garcia ("A Dark Truth"), "Dancing with the Stars" Castoffs, Musical Guest Andy Allo.

Tim Allen; Manny Pacquiao; Flo Rida

Tim Allen ("Last Man Standing"), Manny Pacquiao, Musical Guest Flo Rida.

Ryan Seacrest; Erin Andrews; Soundgarden

Ryan Seacrest ("Dick Clark's New Year's Rockin' Eve with Ryan Seacrest 2013"), Erin Andrews (FOX's College Football Pregame Show), Musical Guest Soundgarden.

Reba McEntire; Mike Tyson; Youngblood Future

Reba McEntire ("Malibu Country"), Mike Tyson, Melissa Rycroft & Tony Dovolani ("Dancing with the Stars"), Musical Guest Future.

Eric Bana; Damian Lewis; Wiz Khalifa

Eric Bana ("Dead Fall"), Damian Lewis ("Homeland"), Musical Guest Wiz Khalifa.

Ted Danson; Emilia Clarke; Larry g(EE)

Ted Danson ("CSI: Crime Scene Investigation"), Emilia Clarke ("Game of Thrones"), Musical Guest Larry g(EE)

Leslie Mann; Ted; Sarah Jaffe

Leslie Mann ("This Is 40"), Seth MacFarlane as Ted ("Ted"), Musical Guest Sarah Jaffe

John Krasinski; Mike Birbiglia; Atlas Genius

John Krasinski ("Promised Land"), Mike Birbiglia ("Sleepwalk with Me"), Musical Guest Atlas Genius

Zachary Knighton; Dan Deacon

TV host Carson Daly; actor Zachary Knighton ("Happy Endings"); musical guest Dan Deacon

Hugh Jackman; Jenna Fischer; 2 Chainz

Hugh Jackman ("Les Misérables"), Jenna Fischer ("The Office"), Musical Guest 2 Chainz.

Samuel L Jackson; Jersey Shore cast; Ed Sheeran

Samuel L. Jackson ("Django Unchained"); the cast of "Jersey Shore": Snooki, JWoww, Pauly D., Vinny, Sami, Ronnie, Mike and Deena; Musical Guest Ed Sheeran

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

Jessica Lange; Adam Pally; Game featuring Tyga