Dennis Quaid, Mamie Gummer

Mila Kunis, Tom Hanks

Chris Pine, Patricia Arquette, Modest Mouse

Kevin Hart, Will Ferrell, Leon Bridges

David Beckham, Claire Danes, Bob Odenkirk

Thomas Lennon, Matthew Perry, Aubrey Plaza, Echosmith

Katie Couric, Jeremy Piven, Emmy Rossum, Olly Murs

Jeff Goldblum, Beck, Rick Schwartz

Jordana Brewster, Dave Grohl, Rainn Wilson

Rob Corddry, Megan Mullally, Tig Notaro

Josh Gad, James Van Der Beek, Jessie Ware

Christoph Waltz, Erin Foster, Sara Foster, George Ezra

Jon Cryer, Freida Pinto, Grace Helbig, Andy Grammer

Nick Kroll, Naomi Campbell, Katharine McPhee

Michael Douglas, Simon Cowell, Jenny Lewis

Rosario Dawson, Sharon Osbourne, Tony Hale

Ben McKenzie, Mark Ronson, Kristen Stewart

Courteney Cox, Oscar Isaac, Joel McHale, Natalie La Rose

Kat Dennings, Beth Behrs, Jason Alexander, Estelle

Julie Chen, Gordon Ramsay, The Ting Tings

Tituss Burgess, Anna Faris

Russell Crowe, Kathryn Hahn, Eddie Izzard, Kodaline

Idina Menzel, Kumail Nanjiani, Manic Street Preachers

Arnold Schwarzenegger, Whitney Cummings, Gavin James

Kaley Cuoco-Sweeting, LL Cool J, OK Go

Dana Carvey, Elizabeth Olsen

Helen Hunt, Nicholas Hoult

Mark Harmon, Zoe McLellan

Susan Sarandon, Brooklyn Decker, Tori Kelly

James Marsden, Kat Graham, Brandon Flowers

One Direction

Anna Kendrick, Brittany Snow, Hailee Steinfeld

Rebecca Romijn, Sam Rockwell

Lisa Kudrow, Zach Woods, Ashima Shiraishi

Halle Berry, Jeffrey Dean Morgan

Hannah Simone, Pete Holmes, Noel Gallagher

Guy Pearce, Connie Britton

Allison Janney, Jerry Ferrara, Paul Dano

Elizabeth Banks, Jane Fonda, Lily Tomlin

Nick Offerman, Ellie Kemper, Thomas Middleditch, Palma Violets

Betty White, Kyle MacLachlan

Chris Pratt, Bryce Dallas Howard, Jake Johnson

David Duchovny, Kit Harington, Tamia

Melora Hardin, Jack Antonoff, Amy Landecker

Kathy Griffin, Derek Luke, The Lone Bellow

Jessica Szohr, Aasif Mandvi, Nick Thune

Carla Gugino, Chris Hardwick

Carli Lloyd, Chris Tucker, Judy Greer

Jim Gaffigan, Shiri Appleby, Best Coast

Cat Deeley,Kid Cudi, Ed Cage & Nicole Paris

Ian McKellen, James Wolk, Adam Lambert

Christina Hendricks, Laverne Cox, Cody Simpson

Chris Colfer, Paula Abdul

Denis Leary, Kristin Chenoweth, American Authors

Cobie Smulders, Judd Apatow, Mark Duplass, Life of Dillon

Mark Ruffalo, Amy Smart, Jason Schwartzman

Trevor Noah, Odette Annable, Eric Idle

Felicity Huffman, Hannibal Buress, Twin Shadow

Christina Applegate, Christian Slater, Elle King

Matt LeBlanc, William H. Macy, Don Cheadle

Gordon Ramsay, Matilda Ramsay, Josh Charles, Milky Chance

Adam Pally, Jeffrey Tambor, Nicole Richie, Laura Marling

Joel McHale, Rosemarie DeWitt, Gary Barlow

Kevin Bacon, Alison Pill, Wolf Alice

Carl Reiner, Jason Segel, Marc Maron

Neil Patrick Harris, Craig Robinson

Lake Bell, Chiwetel Ejiofor, Little Mix

Patrick Stewart, Anthony Davis, Morrissey

Owen Wilson, Johnny Knoxville, Natasha Leggero, Robin Thicke

Ben Kingsley, Bill Hader, Zac Efron

YouTube stars, Boyce Avenue

Bradley Cooper, Andrew Garfield, Jake McDorman, Wiz Khalifa featuring Fall Out Boy

Jason Sudeikis, Chris Bosh

Jeremy Renner, Alison Brie

Show's Past Highlights, Leon Bridges

Adam Scott, Wilmer Valderrama, Marian Hill

Pauley Perrette, Alice Cooper

Chris O' Donnell, Emily Mortimer

Terry Crews, Meagan Good, Dylan O'Brien, Big Sean

Allison Janney, Jesse Tyler Ferguson, Leona Lewis

Emma Roberts, Kristen Schaal, Royal Blood

Brit Marling, Kunal Nayyar, Fifth Harmony

Mel Brooks, Jerrod Carmichael

Carol Burnett, Fred Savage, Marcia Gay Harden, Catfish & The Bottlemen

Zachary Levi, Matt Damon, Nitro Circus

Patricia Arquette, Matt Walsh, Jeremy Irvine, A$AP Rocky

Jessica Alba, Ben Schwartz, Grace

Julianne Moore, John Stamos, Jack Hanna

Chris Parnell, Nina Dobrev, R. City

Jamie Lee Curtis, Sharon Osbourne, Elyes Gabel

Nathan Lane, Rachel Bloom, The Maccabees

Aaron Sorkin, Bradley Whitford

Jeff Daniels, Kirsten Dunst, FFS

Colin Hanks, Juliette Lewis, Matthew Fox, Echosmith

Cindy Crawford, Matt Bomer, Raury

Luke Wilson, Mary Lynn Rajskub, Travis Mills

Rebecca Romijn, David Koechner, Kid Chef Estie Kung, Kygo

Billy Bob Thornton, Brie Larson, Josh Groban, Aston Merrygold

Kate Hudson, Billy Eichner, Ruth Wilson

Josh Duhamel, Kelly Osbourne, Richard Barker

Ken Jeong, Erin Andrews, Bloc Party

Bridget Moynahan, Paul Feig, Nicholas Hytner, The Charlatans

LL Cool J, Alanis Morissette

Anna Faris, Joshua Jackson, Gavin James

Christoph Waltz, Carey Mulligan, Johnny Galecki

Melissa Benoist, Olivia Wilde, Saoirse Ronan

Natalie Dormer, Ty Burrell, Jeezy

Ethan Hawke, Harry Connick Jr., Anthony Anderson, X Ambassadors

Anthony Mackie, Rainn Wilson, Justin Bieber

Bryan Cranston, Joseph Gordon-Levitt, Jacqueline Novak

Rob Lowe, David Spade, Shawn Mendes

Roseanne Barr, Gina Rodriguez, Ellie Goulding, DNCE

Chrissy Teigen, James Van Der Beek, Jay Duplass, Tove Lo

Taye Diggs, Amy Landecker, 5 Seconds of Summer

Krysten Ritter, Ted Danson, The Chainsmokers

Toni Collette, Frank Grillo, James Bay

Billy Crystal, One Direction

Gwendoline Christie, Bryshere "Yazz" Gray, Coldplay

Taraji P. Henson, Justin Bartha, Jermaine Fowler

Tyler Oakley, Hank Azaria, Rick Ross

Chris Hardwick, Lewis Hamilton, Cage the Elephant

Josh Groban, Justin Long, Daya

Domhnall Gleeson, Mike Epps, Chvrches, One Direction

Amber Heard, Luke Bracey, Wanda Sykes, Carly Rae Jepsen

Seth MacFarlane, Lily Tomlin

Sarah Silverman, Taylor Kinney, Alicia Vikander, Jamie Lee

Sarah Hyland, Jack McBrayer, Rami Malek

Kurt Russell, Paul Dano, Gilles Grimandi

Gael Garcia Bernal, Meghan Trainor, Transviolet

Morgan Freeman, Zooey Deschanel, Tim Roth

Betty White, Amar'e Stoudemire, Jack Hanna, Rachel Platten

Tim Robbins, America Ferrera, Adam Devine, Adele

Gillian Anderson, Tyler Perry, JR JR

Jane Lynch, Carrie Brownstein, Joel Edgerton

J.K. Simmons, Josh Holloway, X Ambassadors

Rashida Jones, Lily James, Sean Hayes, BØRNS

Nathan Fillion, Randall Park, Cirque Kurios

Josh Radnor, Maggie Grace, Nathan Sykes, Chris Martin

Rosie O'Donnell, Nikki Glaser, Addison Osta Smith

Eva Longoria, Tom Ellis, 5 Seconds of Summer

Zac Efron, Anna Kendrick, Adam DeVine, Carpool Karaoke with Elton John

Mayim Bialik, Piers Morgan, Charlie Puth

Von Miller, Jennifer Jason Leigh, Joe Mangeniello, Glen Hansard

LL Cool J, Viola Davis, Malin Akerman

Chiwetel Ejiofor, Grace Helbig, Jake Lacy, Albert Hammond Jr.

Chelsea Handler, Jason Schwartzman, Alessia Cara

Selma Blair, Juno Temple, Ben Feldman, Sia

Ryan Reynolds, Katie Holmes, Judd Apatow, Lianne La Havas

Katie Couric, Gillian Jacobs, Anders Holm

Dr. Phil, Shad Moss, Cristin Milioti, Awolnation

Khloe Kardashian, Josh Duhamel

Norman Reedus, Jenna Dewan Tatum, Miguel

Casey Affleck, Lucy Hale

Ellen Page, Paul Rust, Jenny Slate

JJ Redick, Freida Pinto, Saffron Burrows

Lea Michele, Ginnifer Goodwin

Gerard Butler, Will Forte, M. Ward

Queen Latifah, David Walliams, Elle King

Neve Campbell, Jay Duplass, Mark Duuplass, Gwen Stefani

Martin Short, Will Arnett

Connie Britton, Mark Cuban, Cameron Esposito

Amanda Peet, Max Greenfield, Panic! At The Disco

Paul Rudd, Diane Lane

Colin Farrell, Wanda Sykes, Jack Hanna, Demi Lovato