Britney Spears, Simon Cowell

45 min

Dave Matthews Band, Allison Janney, Reese Witherspoon

45 min

Katy Perry, Little Big Town

45 min

Justin Bieber, Phillip Phillips

45 min

Bethenny Frankel, Kellie Pickler, the top four from "So You Think You Can Dance"

45 min

Clint Eastwood, Pattie Mallette, Carly Rae Jepsen

45 min

Michael J. Fox, L.A. Reid, PSY

45 min

Amy Poehler, Ricky Gervais

45 min

Dennis Quaid, Jenna Dewan-Tatum

45 min

Viola Davis, Pamela Anderson

45 min

Zooey Deschanel, Maggie Elizabeth Jones, No Doubt

45 min

Joseph Gordon-Levitt, Kerry Washington, No Doubt

45 min

Jennifer Garner, Dwight David Howard, Green Day

45 min

Selena Gomez, Kobe Bryant, the Killers

45 min

Liam Neeson, Gilles Marini & Peta Murgatroyd, Cher Lloyd

45 min

Matchbox Twenty

45 min

Eric Dane, Mike "The Situation" Sorrentino, Paul "Pauly D" DelVecchio, Ronnie Ortiz-Magro, Vinny Guadagnino, OneRepublic

45 min

Zac Efron, Rebel Wilson, Ed Sheeran

45 min

Winona Ryder, Cheryl Hines

45 min

Colin Farrell

45 min

Matthew Perry, Justin Bartha

45 min

Eric Stonestreet, Rachel Maddow, Joshua Radin

45 min

Octavia Spencer

45 min

Kate Walsh, Mike Epps, Anthony Robles

45 min

Joel McHale

45 min

Emma Watson, Kym Douglas, D.L. Hughley, the Wallflowers

45 min

Matthew Fox, Ellie Goulding

45 min

Nicole Richie, Nina Conti

45 min

Jessica Lange, Beth Behrs, Hunter Hayes

45 min

Portia De Rossi, Jerry O'Connell, LL Cool J, Victoria Jackson & Ali Guthy

45 min

Helen Hunt

45 min

Taylor Swift

45 min

Halle Berry

45 min

Madonna

45 min

Steve Harvey, Macklemore & Ryan Lewis

45 min

Jane Lynch

45 min

Emmitt Smith, Cheryl Burke

45 min

Denzel Washington, Jenna Fischer, Luke Bryan

45 min

Julie Bowen, Peter Facinelli, Elizabeth Reaser

45 min

Model Heidi Klum; actresses Nikki Reed and Mackenzie Foy

45 min

Actor Russell Brand; reality star Bethenny Frankel

45 min

Actress Miley Cyrus; actors Maggie Grace and Jackson Rathbone

45 min

Actors Robert Pattinson and Taylor Lautner; actress Kirstie Alley

45 min

Adam Levine, Jennifer Hudson, Maroon 5

45 min

Actor Andrew Garfield; reality-TV stars Alison Eastwood and Donald Schultz; Ne-Yo performs.

45 min

Singer Rihanna; Blue Man Group performs.

45 min

Actress Keira Knightley; One Direction performs at an outdoor concert.

45 min

Actress Vanessa Williams; Jason Aldean performs.

45 min

Alyson Hannigan

45 min

Actor Jesse Tyler Ferguson; an interview and performance by Kelly Clarkson

45 min

Actress Jennifer Lawrence.

45 min

Actor Ray Romano; dancer Stephen ''tWitch'' Boss; Cirque du Soleil's Kiriki act perform.

45 min

Ellen Pompeo, Jason Sudeikis, Miguel

45 min

Khloe Kardashian, Damian Lewis, Jane Lynch

45 min

Tim Allen, Kunal Nayyar, Maroon 5

45 min

Wanda Sykes, Kevin Pollak

45 min

Jessica Biel, Damon Wayans Jr.

45 min

Gerard Butler, Giada De Laurentiis, Martha Plimpton

45 min

John Travolta, Olivia Newton-John, Mario Lopez

45 min

Drew Barrymore, Cory Monteith

45 min

Christina Aguilera

45 min

Fergie, Nathan Lane

45 min

Naomi Watts, J.R. Martinez

45 min

Howie Mandel, Tom Shadyac, Idina Menzel

45 min

Amanda Seyfried, Usher

45 min

Hugh Jackman, Justin Bieber

45 min

Anne Hathaway, Cee-Lo Green

45 min

Bradley Cooper, Bruno Mars

45 min

Megan Fox, Eddie Redmayne, Bethenny Frankel

45 min

Jamie Foxx, Rosemarie DeWitt, One Direction

45 min

Alison Sweeney, Allen Stone

45 min

Timothy Olyphant, Sarah Hyland, Justin Flom

45 min

Courteney Cox, Kevin Hart

45 min

Kaley Cuoco, Padma Lakshmi

45 min

Bethenny Frankel, Ricky Gervais, Kevin Nealon

45 min

Emma Stone, Common

45 min

Jimmy Kimmel

45 min

Keith Urban, Savannah Guthrie

45 min

Nicki Minaj

45 min

Jennifer Lopez, Kyle Chandler, Phillip Phillips

45 min

Mark Wahlberg, Josh Hopkins

45 min

Chris Kluwe, Macklemore & Ryan Lewis

45 min

Chris Colfer, Paul

45 min

Michael Chiklis

45 min

Simon Baker, NeNe Leakes

45 min

Kristen Bell, Cedric the Entertainer

45 min

Jude Law, Blind Pilot

45 min

Sean Hayes, Jillian Michaels

45 min

Sally Field, Quvenzhane Wallis

45 min

Catherine Zeta-Jones, Nicholas Hoult

45 min

Ryan Seacrest

45 min

Chris Tucker, Nolan Gould

45 min

Kiefer Sutherland

45 min

Naomi Campbell, Tim McGraw

45 min

Melissa McCarthy, Jacki Weaver

45 min

Emeli Sande

45 min

Ewan McGregor, Sophia Grace & Rosie

45 min

David Spade, The Lumineers

45 min

Michelle Obama, Al Gore, Bruno Mars

45 min

Mila Kunis, Tegan and Sara

45 min

Sofia Vergara, Josh Groban

45 min

Josh Duhamel, Bethenny Frankel, Alicia Keys

45 min

Chelsea Handler

45 min

Dennis Quaid, Nicole -Snooki- Polizzi, Jenni -JWoww- Farley

45 min

Wanda Sykes, Kate Upton, Kym Douglas

45 min

Russell Brand, Wolfgang Puck

45 min

Kate Walsh, Steve Harvey

45 min

Felicity Huffman

45 min

Randy Jackson, Cameron Mathison

45 min

Colin Farrell, Steve Spangler

45 min

Zach Braff, Laurie Holden, Chris Mann

45 min

Mark Wahlberg and Sean "Diddy" Combs, Bonnie Raitt

45 min

Ellie Kemper, Rico Rodriguez

45 min

Salma Hayek, Kellan Lutz

45 min

Jessica Simpson, Jimmie Johnson

45 min

Howie Mandel, Dave Grohl

45 min

Steve Carell, Emily VanCamp

45 min

Jessica Alba, Scott Foley

45 min

Josh Duhamel, Bethenny, Alicia Keys

45 min

Halle Berry

45 min

Jennifer Love Hewitt, D.L. Hughley & Cheryl Burke

45 min

Joel McHale, Michael Weatherly

45 min

Nicolas Cage

45 min

John Mayer, Eva Mendes

45 min

Bruno Mars, Ted Danson

45 min

Matthew Perry, Chris O'Dowd

45 min

Kellie Pickler, Giuliana and Bill Rancic

45 min

Chris O'Donnell, Aubrey Plaza

45 min

Jerry O'Connell, Brad Paisley

45 min

Mario Lopez, Kacey Musgraves, Bethenny Frankel

45 min

Julia Louis-Dreyfus, The Band Perry

45 min

Heidi Klum, Michael Weatherly

45 min

Hilary Duff, D.L. Hughley and Cheryl Burke

45 min

Selena Gomez, Sophia Grace & Rosie

45 min

The Cast of 'Grown Ups 2'!

45 min

Jennifer Aniston, Bryce Dallas Howard, Brittany Snow

45 min

Jennifer Love Hewitt, Ryan Lochte

45 min

Jane Lynch, Kenny Chesney

45 min

Diane Keaton, Jon Bon Jovi

45 min

Dennis Quaid, Kate McKinnon

45 min

An Hour with Justin Timberlake

45 min

Gwyneth Paltrow, will.i.am

45 min

Vince Vaughn, Sophia Grace & Rosie

45 min

LL Cool J

45 min

Cher, ‘Long Island Medium’ Theresa Caputo

45 min

Alison Sweeney, Michael Buble

45 min

Cinco de Mayo Pub Quiz, Ellen Pompeo

45 min

Matt Lauer, Sophia Grace & Rosie

45 min

Lauren Graham, Lady Antebellum

45 min

Harry Connick Jr., Kai Langer

45 min

Neil Patrick Harris, Beth Behrs

45 min

Mother's Day Show, Shakira, Bethenny Frankel

45 min

Kerry Washington, Demi Lovato

45 min

Cousins on Call Renovation Revealed!

45 min

B Girls and More

45 min

Sophia Grace & Rosie, Chris Pine, Robin Thicke

45 min

Rob Lowe, Alex O'Loughlin

45 min

Ed Helms, and the winner of 'Ellen Here's My Talent'

45 min

Sophia Grace & Rosie, Hayden Panettiere

45 min

Jennifer Aniston, Portia de Rossi!

45 min

Amanda Seyfried, Kevin Nealon

45 min

Steve Harvey, Grizzly Bear

45 min

Memorial Day with Ellen!

45 min

Tyler Perry, Ludacris

45 min

Howie Mandel, Usher

45 min

Steve Carell, Justin Flom

45 min

Wanda Sykes, OneRepublic

45 min

Kristen Bell, Joe Manganiello

45 min

Amy Adams, Olivia Munn

45 min

Owen Wilson, Bridgit Mendler

45 min

Will and Jaden Smith!

45 min

Sophia Grace & Rosie, Vince Vaughn

45 min

Sophia Grace & Rosie, Wendy Williams

45 min

Bethenny Frankel, Martin Short

45 min

Ellen in Sydney

45 min

Ellen in Melbourne

45 min

Jennifer Love Hewitt, Ryan Lochte

45 min

Miley Cyrus, and 'Twilight'!

45 min

Shakira, Bethenny Frankel

45 min

Kaley Cuoco, Padma Lakshmi, Keone and Mariel Madrid

45 min

Russell Brand, Wolfgang Puck

45 min

Jennifer Lopez, Kyle Chandler

45 min

Wanda Sykes, Dave Franco

45 min

Jessica Simpson, Jimmie Johnson

45 min

Clint Eastwood, Carly Rae Jepsen and Justin Bieber's mom, Pattie Mallette

45 min

Melissa McCarthy, Jacki Weaver

45 min

The Cast of 'Grown Ups 2'!

45 min

Emma Stone and Common

45 min