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Dakota Fanning, Charles Barkley, Musashimaru, Christina Aguilera, Herbie Hancock

Debra Messing, Ed McMahon, Weezer

Antonio Banderas, Greg Behrendt, Michael McElroy, Ashlee Simpson

Halloween Episode: Rosario Dawson, Ozzy Osbourne

Jimmy Smits, Lisa Marie Presley

Dr. Phil McGraw, Dennis Rodman, Dwight Yoakam

Nicollette Sheridan, Marc Yu, Fiona Apple

Jennifer Love Hewitt, John Fogerty

Dana Carvey, Steve Irwin, Jamiroquai

Martha Stewart, Terrence Howard, Big and Rich

Nicole Richie, Jon Favreau

Garth Brooks, Patricia Arquette

Eva Longoria, Collin Kelly, Kenny Chesney

Jason Lee, Usher, Neil Diamond, Brian Wilson

Melissa Etheridge

Hugh Laurie, Joan Embery, George Clinton

Jerry Seinfeld, Shelley Berman, Carrie Underwood

Teri Hatcher, Cedric the Entertainer, Sheryl Crow

Jimmy Carter, Wentworth Miller, Eurythmics

Tom Arnold, Phil Jackson, Audioslave

Melanie Griffith, Scott Stapp

Lindsay Lohan, Dane Cook

Sinbad, Jo Frost

Naomi Watts, Dwight Hauff, Queens of the Stone Age

Diane Keaton, Marguerite Perrin, Alanis Morissette

Snoop Dogg, Howard Dean, Faith Evans

Jarod Miller, Snoop Dogg, All American Rejects

Tyra Banks, Steve Schirripa, Smash Mouth

Sarah Jessica Parker, Isaac Mizrahi, Bo Bice

Ron Howard, Rachael Ray, Brian Wilson

Tommy Lee Jones, Sarah Silverman, Diana Krall

George Clooney, Steve Schirripa, Trey Anastasio

Scarlett Johansson, Larry the Cable Guy, Fall Out Boy

Anthony Hopkins, Howie Mandel, Coldplay

Steve Martin, Tyler James Williams, Chris Brown

Ralph Fiennes, Carmen Electra, Michael McDonald

Johnny Knoxville, Natasha Leggero, Chris Isaak

Zach Braff, Allen Covert, Aaron Neville

Pamela Anderson, Brian Setzer Orchestra

Wanda Sykes, Carson Daly, Big Bad Voodoo Daddy

Julie Scardina with Amazing Animals, Greg Kinnear, MercyMe

Terry Bradshaw, Dame Edna, Blind Boys of Alabama

Sienna Miller, Gary Gulman

Philip Seymour Hoffman, Noelle Pikus-Pace, John Mayer Trio

Terrence Howard, Carrot Top, Jace Everett

Will Ferrell, Flipsyde

Rachel Weisz, ANT, Lil' Wayne

Matthew Broderick, Nathan Lane, Chad Hedrick, Billy Currington

Joaquin Phoenix, Jo Koy, Alanis Morissette

Steve Carell, Maria Lark, Anthony Hamilton

Emma Thompson, Jeff Daniels, Sugarland

Jake Gyllenhaal, Steve Irwin, Seether

Simon Cowell, Randy Jackson, Paula Abdul, Wendy Liebman, Barry Manilow

Heath Ledger, Heidi Klum, Ray J

Colin Firth, Sasha Cohen, Fort Minor

Albert Brooks, Jenna Elfman, Mary J. Blige

Dennis Miller, Bob Uecker, Heather Headley

Ladysmith Black Mambazo, Sarah McLachlan

Jamie Foxx, U.S. Freestyle Aerials Team

Kate Beckinsale, Kinky Friedman, Nickel Creek

Joaquin Phoenix, Joy Koy, Alanis Morisette

Dominic Monaghan, Emily Deschanel, P.O.D.

Harrison Ford, Bryce Dallas Howard, Juanes

Snoop Dogg, Ron White

Roseanne Barr, Sue Johanson, Sergio Mendes

Jarod Miller, Paul Bettany, Collective Soul

Terry Bradshaw, Candice Michelle, Yo Yo Ma with John Williams

Ellen DeGeneres, Geoffrey Gallante, Yellowcard

Felicity Huffman, Jerome Bettis, The Fray

Michelle Williams, John Krasinski, Rob Thomas

Paul Walker, Jillian Barberie, Fiona Apple

Jennifer Love Hewitt

Paul Reiser

Matt Dillon, Sports Illustrated Swimsuit Cover Model

Bill Maher, Shaun White

Samuel L. Jackson, Kathleen Madigan

Rob Schneider, Alonzo Bodden

Season 14

President George W. Bush & Laura Bush, Ben Harper with Charlie Musselwhite

Talk

Comedy

The Tonight Show with Jay Leno

Season 1

Season 2

Season 3

Season 4

Season 5

Season 6

Season 7

Season 8

Season 9

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Season 11

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Season 15

Season 16

Season 17

Season 18

Season 19

Season 20

Season 21

Specials

Jay Leno hosts some of the biggest celebrities in the world.