Actress Leah Remini.

He's the hilarious star of one of the hottest shows on television, it's ERIC STONESTREET! His show "Modern Family" won the Emmy for Outstanding...

One of Hollywood's funniest leading men, JIM CARREY is here! From his start on "In Living Color" through his astounding list of film credits,...

The record release party for Justin Timberlake's upcoming CD "The 20/20 Experience -- 2 of 2."

LL Cool J ("NCIS: Los Angeles"); Capital Cities performs.

Jessica Alba ("A.C.O.D."); Jenna Dewan-Tatum ("Witches of East End"); 4-year-old Kai Langer performs; guest DJ Max Greenfield.

Sean Hayes ("Sean Saves the World"); Jennifer Lopez, Keith Urban, Harry Connick Jr. and Ryan Seacrest; D.L. Hughley ("Trust Me, I'm a Game Show...

Daniel Radcliffe ("Kill Your Darlings"); Jack Osbourne and Cheryl Burke ("Dancing With the Stars").

Julianne Moore ("Carrie"); Demi Lovato performs.

Actress Kate Hudson; Steve Martin and Edie Brickell perform.

Jack Black ("Ghost Girl"); Joshua Malina ("Scandal"); Lorde performs; guest DJ Shemar Moore.

Patrick Dempsey ("Grey's Anatomy"); Mike O'Malley ("Welcome to the Family"); Fall Out Boy performs; guest DJs Pete Wentz and Patrick Stump.

Miley Cyrus performs; guest DJ tWitch.

Kat Dennings and Beth Behrs ("2 Broke Girls"); guest DJ tWitch.

Wanda Sykes ("Alpha House"); Jared Leto ("Dallas Buyers Club"); Fitz & the Tantrums perform; guest DJ Jason Derulo.

Owen Wilson and Woody Harrelson ("Free Birds"); Rosie Perez ("The Counselor"); guest DJ tWitch.

Pamela Anderson; Jimmy Buffet performs.

Alyson Hannigan ("How I Met Your Mother"); Corbin Bleu and Karina Smirnoff ("Dancing With the Stars").

Viola Davis ("Ender's Game"); Nicole "Snooki" Polizzi and Jenni "JWoww" Farley ("Snooki & JWOWW"); Snooki dances with her "Dancing With the Stars"...

Ethan Hawke ("Before Midnight"); Ellen checks in on a little boy with a heart defect; guest DJ Helio Castroneves; Lady Antebellum performs.

Shania Twain (Las Vegas show "Still the One"); Bellamy Young ("Scandal"); NHL player Anze Kopitar; Bon Jovi performs.

Amy Poehler ("Parks and Recreation"); Asa Butterfield ("Ender's Game"); Ellie Goulding performs; guest DJ Joey Fatone.

Sean "Diddy" Combs ("Revolt TV"); Mary Steenburgen ("Last Vegas"); Elizabeth Berkley and Val Chmerkovskiy ("Dancing With the Stars"); Tori Kelly...

Michael Ealy ("Almost Human"); firefighters tell of reviving two puppies they found in a burning house; Keith Urban is interviewed and performs;...

Rachel McAdams ("About Time"); Hailee Steinfeld ("Ender's Game"); comic Kevin Nealon.

Ed O'Neill ("Modern Family"); 8-year-old Alma Deutscher performs; guest DJ Derek Hough.

Halloween; Alison Sweeney ("The Biggest Loser").

Jennifer Garner ("Dallas Buyers Club"); guest DJ Derek Hough.

Melissa McCarthy ("Mike & Molly"); Sophia Grace and Rosie.

Matthew McConaughey ("Dallas Buyers Club"); Taye Diggs ("The Best Man Holiday"); model Robyn Lawley; James Blunt performs; guest DJ Adam Lambert.

Ashton Kutcher ("Two and a Half Men"); chef José Andrés; guest DJ Loni Love; Sting is interviewed and performs.

Kaley Cuoco ("The Big Bang Theory"); science guy Steve Spangler; The Wanted perform.

Rob Lowe ("Killing Kennedy"); Sophia Grace and Rosie; guest DJ Paris Hilton.

Rebel Wilson ("Super Fun Night"); guest DJ Adam Lambert.

Emma Thompson ("Saving Mr. Banks"); Lenny Kravitz ("The Hunger Games: Catching Fire"); Peyton Robertson, America's Top Young Scientist 2013; guest DJ...

Matt Lauer ("Today"); Kellie Pickler performs; guest DJ tWitch.

Kerry Washington ("Scandal"); David Morrissey ("The Walking Dead").

The Killers perform; guest DJ tWitch.

James Franco ("Homefront"); Sophia Grace and Rosie; guest DJ tWitch.

Elizabeth Banks ("Hunger Games: Catching Fire"); Mario López ("The X Factor"); Jason Mraz and Travie McCoy perform.

Singer Fergie; Sophia Grace and Rosie.

Robin Williams ("The Crazy Ones").

Lady Gaga performs.

Simon Cowell ("The X Factor"); Fifth Harmony performs; guest DJ tWitch.

Kristen Bell ("House of Lies"); guest DJ 2 Chainz.

Hayden Panettiere ("Nashville"); Luke Bryan performs.

Singer Garth Brooks.

Allison Janney ("Mom"); Chord Overstreet ("Glee"); Jaime Kailani Bayot and Tiara, Tahiti and Presley Hernandez ("The Lylas"); Gavin DeGraw performs.

Britney Spears; John Legend performs.

Ben Stiller ("The Secret Life of Walter Mitty"); Steve Coogan ("Philomena"); 10-year-old guitar prodigy Brandon Niederauer.

Adam Levine ("The Voice"); guest DJ tWitch.

Kelly Clarkson performs; guest DJ tWitch.

Jake Gyllenhaal ("Prisoners"); guest DJ Loni Love.

Carey Mulligan ("Inside Llewyn Davis"); tennis player Maria Sharapova; Phoenix performs; guest DJ Candice Swanepoel.

Tom Hanks ("Saving Mr. Banks"); ballplayer Andrew McCutchen.

A 5-year-old drum major; Lea Michele performs.

Tyler Perry ("Tyler Perry's A Madea Christmas"); Ken Jeong ("Despicable Me 2"); guest DJ Jenni "JWoww" Farley ("Snooki & JWOWW").

Colin Farrell ("Saving Mr. Banks"); Kathryn Hahn ("The Secret Life of Walter Mitty"); Kings of Leon perform.

Chris O'Donnell ("NCIS Los Angeles"); Terry Bradshaw ("Terry Bradshaw: America's Favorite Dumb Blonde ... A Life In Four Quarters"); Icona Pop...

Julia Roberts ("August: Osage County"); Julia Louis-Dreyfus ("Enough Said"); Martha Stewart; guest DJ tWitch.

Amy Adams ("American Hustle"); guest DJ tWitch.

Katy Perry performs; guest DJ tWitch.

Singer Eddie Murphy; 16-year-old singer David Thibault; DJ tWitch.

Courteney Cox ("Cougartown"); Timothy Olyphant ("Justified"); Sara Bareilles performs; guest DJ Loni Love.

Mark Wahlberg and Taylor Kitsch ("Lone Survivor"); Kym Whitley ("Raising Whitley"); guest DJ Tamar Braxton performs.

Joseph Gordon-Levitt ("HitRECord on TV"); guest DJ tWitch.

Matt LeBlanc ("Episodes"); Jared Leto ("Dallas Buyers Club"); 30 Seconds to Mars performs; guest DJ tWitch.

Actress Drew Barrymore; Kenneth Branagh ("Jack Ryan: Shadow Recruit"); guest DJ tWitch; Camren Anthony performs.

Julianna Margulies ("The Good Wife"); Chiwetel Ejiofor ("12 Years a Slave"); guest DJ tWitch; John Newman performs.

Jennifer Lopez, Harry Connick Jr. and Keith Urban ("American Idol"); guest DJ Loni Love; Sharon Jones and the Dap-Kings perform.

Chris Pine ("Jack Ryan: Shadow Recruit"); guest DJ Loni Love; Quinn Sullivan performs.

Kim Kardashian ("Keeping Up With the Kardashians"); guest DJ tWitch.

Meryl Streep ("August: Osage County"); Vanessa Hudgens ("Gimme Shelter"); guest DJ tWitch.

Seth Meyers ("Late Night"); Busy Philipps ("Cougar Town"); guest DJ Alison Sweeney.

Kirstie Alley ("Kirstie"); guest DJ Loni Love.

Joel McHale ("Community"); guest DJ tWitch.

Guest DJ tWitch.

Timothy Olyphant ("Justified"); guest DJ tWitch.

Jake Bugg performs.

Jay Leno ("The Tonight Show"); Terry Crews ("Brooklyn Nine-Nine").

Zac Efron ("That Awkward Moment").

Michael J. Fox ("The Michael J. Fox Show"); Max Greenfield ("New Girl").

Jesse Tyler Ferguson ("Modern Family").

Guest DJ Chris Harrison ("The Bachelor").

Chef Wolfgang Puck; guest DJ Cheryl Burke ("Dancing With the Stars").

Channing Tatum, The Oscar Experience College Search; Kate McKinnon ("Saturday Night Live").

Talk-show host Steve Harvey; American Authors performs.

Jessica Alba, The Honest Company.

Kevin Hart ("About Last Night").

Bradley Cooper ("American Hustle"); NBA star Chris Paul; teen monster-truck driver Rosalee Ramer.

Cameron Diaz ("The Body Book"); 7-year-old piano prodigy Elias Phoenix.

Kevin Costner ("3 Days to Kill"); Band of Horses performs.

Bradley Cooper ("American Hustle").

Harry Connick Jr. ("American Idol").

Jonah Hill ("The Wolf of Wall Street"); Lionel Richie performs.

Comic David Spade.

Jessica Lange ("In Secret"); Lupita Nyong'o ("12 Years a Slave"); "science guy" Steve Spangler.

Tim Allen ("Last Man Standing").

Minnie Driver ("About a Boy").

Talk-show host Jimmy Kimmel; Allison Williams ("Girls"); guest DJ tWitch.

Post-Oscar show; guest DJ Max Greenfield.

Actress Sarah Jessica Parker; Theresa Caputo ("Long Island Medium"); guest DJ tWitch.

Cheryl Hines ("Suburgatory"); guest DJ tWitch.

Toni Braxton and Baby Face perform.

TV host Maria Menounos ("Extra").

George Lopez ("Saint George").

Comic Wanda Sykes; actress Jordana Brewster ("Dallas").

Kate Winslet ("Divergent"); Josh Radnor ("How I Met Your Mother"); Lake Street Dive performs.

Arianna Huffington ("Thrive"); Brandy Clark performs.

Lauren Graham ("Someday Someday Maybe"); snowboarder and musician Shaun White; Brandy Clark performs.

Jennifer Lopez ("American Idol"); Theresa Caputo ("Long Island Medium"); Aloe Blacc performs.

Emma Watson ("Noah"); co-host Jason Bateman.

Lindsay Lohan ("Lindsay"); Amy Schumer ("Inside Amy Schumer"); 13-year-old singer John-Robert Rimel performs; guest DJ tWitch.

Actress Jennifer Love Hewitt; Cheryl Hines ("Suburgatory"); Beck performs.

Simon Baker ("The Mentalist"); Sophia Grace and Rosie; Anthony Mackie ("Captain America: The Winter Soldier").

Singer Luke Bryan; author B.J. Novak ("One More Thing: Stories and Other Stories"); beauty specialist Kym Douglas.

Andrew Garfield, Emma Stone and Jamie Foxx ("The Amazing Spider-Man 2"); Dan & Shay perform; guest DJ tWitch.

Greg Kinnear ("Heaven Is for Real"); NeNe Leakes ("Dancing With the Stars"); a young woman whose YouTube video of her speaking gibberish in several...

Jon Hamm ("Mad Men"); Kate Mara ("Transcendence").

Co-host Rob Lowe.

Actress Zooey Deschanel; Chadwick Boseman ("Draft Day"); Pharrell Williams performs.

Miranda Lambert performs.

Eva Longoria ("Devious Maids"); Clark Gregg ("Agents of S.H.I.E.L.D.").

Kate Walsh ("Fargo"); Marlon Wayans ("A Haunted House 2"); Ellie Goulding performs.

Billy Crystal ("700 Sundays"); Katie Lowes ("Scandal"); Frank Turner performs.

Chelsea Handler ("Uganda Be Kidding Me"); Elisabeth Moss ("Mad Men"); Jason Derulo performs.

Kristen Bell ("Veronica Mars"); Tony Hale ("Veep"); Needtobreathe performs.

Ice Cube ("Ride Along"); guest DJ tWitch.

Phillip Phillips performs.

Ricky Martin performs.

Adam Levine ("The Voice").

Actresses Mary-Kate and Ashley Olsen; formerly homeless pianist James Matthews; 5-year-old YouTube sensation Kai Langer performs.

LL Cool J ("NCIS: Los Angeles"); Amy Purdy and Derek Hough ("Dancing With the Stars"); 5-year-old YouTube sensation Kai Langer performs.

Newscaster Robin Roberts; Carla Bruni performs.

Ryan Seacrest ("American Idol"); Dave Franco ("Neighbors").

Seth Rogen ("Neighbors").

Beth Behrs ("2 Broke Girls"); Ricky Martin performs.

Megan Fox ("Teenage Mutant Ninja Turtles").

Kevin Spacey ("House of Cards," "NOW: In the Wings on a World Stage"); Alison Sweeney (novel "The Star Attraction").

Julia Roberts ("The Normal Heart"); 3-year-old dancer Heaven King and her mother; Ray LaMontagne performs.

Connie Britton ("Nashville"); actress Ellie Kemper; 5-year-old twins Zony and Yony perform.

Mila Kunis ("Jupiter Ascending"); Keith Urban performs.

Eric Stonestreet ("Modern Family"); jugglers Raphaël Dubé and Yohann Trépanier; rapper Ludacris.

Maya Rudolph ("The Maya Rudolph Show"); 5-year-old dancing twins Zony and Yony.

Emily Blunt ("Edge of Tomorrow"); Ansel Elgort ("The Fault in Our Stars").

Allison Janney ("Masters of Sex"); Sophia Grace and Rosie; Florida Georgia Line performs.

Amanda Seyfried ("A Million Ways to Die in the West"); Ed Sheeran performs.

Adam Sandler, Drew Barrymore, Wendi McLendon-Covey, Kevin Nealon and Terry Crews ("Blended"); Sophia Grace and Rosie.

Halle Berry ("X-Men: Days of Future Past"); Tim McGraw performs.

Charlize Theron and Seth MacFarlane ("A Million Ways to Die in the West"); Coldplay performs.

Jim Parsons ("The Normal Heart"); Sasha Alexander ("Rizzoli & Isles").

Diane Keaton ("And So It Goes"); Taylor Kitsch ("The Grand Seduction").

Ellen Page ("X-Men: Days of Future Past"); Katie Lowes ("Scandal"); Jhené Aiko performs; guest DJ tWitch.

Actress Leah Remini; tWitch, Robert Roldan, Fik-Shun, Marko Germar, Allison Holker, Courtney Galiano, Jasmine Harper and Lauren Froderman ("So You...

Jeff Bridges ("The Giver"); guest DJ Loni Love.

Wanda Sykes ("Last Comic Standing"); Matt Bomer ("The Normal Heart"); world-champion salsa dancers Beberly Devers and Kevin Tellez; guest DJ tWitch.

Ellen's favorite child moments of past seasons; R5 performs.

Ellen's favorite celebrity moments of past seasons; Ed Sheeran performs.

Ellen sure has a lot of fun when her celebrity friends swing by the show! Some of these moments are too good to watch only once. Remember when Meryl...

The "Wolf of Wall Street" bares his tenacious energy and steamy good looks when LEONARDO DiCAPRIO stops by! The actor's recent role has him playing...

EMILY BLUNT is here! The Golden Globe winner and new mom heads back to the big screen this summer in the sci-fi thriller "Edge of Tomorrow," adding...

The father of all reality show judges recently became a father! SIMON COWELL is in Ellen's studio talking baby! The tough-love tycoon is filling...

One of Hollywood's funniest leading men, JIM CARREY is here! From his start on "In Living Color" through his astounding list of film credits,...