Season 1
Jerry Seinfeld, Jay-Z with Rihanna & Kanye West
Michael Moore, Tom Cruise, Cameron Diaz
Robin Williams, Miley Cyrus
Halle Berry, Bruce Hornsby with Eric Clapton
Drew Barrymore, Mel Gibson
Jennifer Garner, Barney Frank, Headlines
Pee-Wee Herman, Amy Poehler, 99 Cent Store
Vince Vaughn, Michaels vs. Costas
Rush Limbaugh, Smokey Robinson with Joss Stone
Hugh Laurie, LeBron James
Bill Maher, Brad Paisley & Sheryl Crow
Julia Louis-Dreyfus, Billy Crystal
Adam Carolla, Steve Carell, Vince Gill & Emmylou Harris
Chris Rock
Jenna Fischer, Dan Ahdoot, Photo Booth
Jamie Foxx, Joe Torre
Abigail Breslin, Cindy McCain
Wanda Sykes, Kathleen Sebelius
Gerard Butler, Ben Harper & Jack Black
Terry Bradshaw
Dana Carvey
John C. Reilly, Ben Roethlisberger
Mikey Day, Bill Cosby
Matt Lauer, Jeff Dunham
Ross Mathews, Sen. John McCain
Rod Stewart
Martha Stewart, Ludacris
Rainn Wilson
Hilary Swank, Jerry Jones
Colin Firth
Dr. Phil McGraw
Jay's guest is Dr. Phil McGraw.
Ewan McGregor, Tina Fey
Chelsea Handler, Brian Williams
Comic Chelsea Handler; journalist Brian Williams.
Paula Abdul
John Cusack, Frank Caliendo
Actor John Cusack; comic Frank Caliendo; comic Adam Carolla.
Mariah Carey, a performance from Cirque du Soleil's
Katie Featherston & Micah Sloat
Jenna Bush Hager, Laura Bush
Author Jenna Bush Hager; former first lady Laura Bush; comic Mikey Day.
Wanda Sykes, Rachael Ray, Dan Finnerty & the Dan Band
Comic Wanda Sykes; TV personality Rachael Ray; Dan Finnerty and the Dan Band.
Elizabeth Banks
Actress Elizabeth Banks.
Kathy Griffin
Howie Mandel
Sandra Bullock
Actress Sandra Bullock; comic Mikey Day.
Penelope Cruz, Dolly Parton
Actress Penélope Cruz; singer Dolly Parton.
Terrence Howard, Terry Bradshaw
Taylor Lautner, Heather Locklear
The Biggest Loser Rebecca Meyer, Kevin Nealon, Tyra Banks
Larry the Cable Guy, Mikey Day
Comic Larry the Cable Guy; correspondent Mikey Day.
Dakota Fanning, Kate Flannery, Jeff Dunham, Mikey Day
Kellan Lutz, Ed Begley Jr.
Gov. Arnold Schwarzenegger, Lady Gaga
Gov. Arnold Schwarzenegger (R-Calif.); Lady Gaga performs.
Charles Barkley, The Biggest Loser contestant Allen Smith
Paula Patton
Megan Fox
Actress Megan Fox.
Bill Maher
Features host of Real Time with Bill Maher and his 'Green Car Challenge', 'Ten @ Ten' segment with Jennifer Lopez, Adam Corrolla with 'Kackass of the Month', and 'Headlines' segments.
John Travolta, Kim Kardashian
Morgan Freeman, Maxwell, Nick Thune
Kelsey Grammer, Taylor Swift
Actor Kelsey Grammer; musician Taylor Swift.
Susan Sarandon, Andrea Bocelli with the Muppets
Gabourey Sidibe, Winner of The Biggest Loser Danny Cahill
Actress Gabourey Sidibe; Ross Matthews talks to the winner of "The Biggest Loser."
Quentin Tarantino, Drew Brees
Director Quentin Tarantino; professional football player Drew Brees.
Matt Damon, Barry Manilow
Actor Matt Damon; Barry Manilow performs.
Gordon Ramsay
Chef Gordon Ramsay; musician Brad Paisley.
Anna Kendrick, Tim McGraw
Actress Anna Kendrick; director James Cameron.
Christina Applegate, Nick Lachey
Sigourney Weaver, John Mayer
Actress Anna Kendrick; director James Cameron.
Sam Worthington, Mary J. Blige
Actor Sam Worthington; Mary J. Blige performs.
Glenn Beck, Kate Gosselin
TV show host Glenn Beck; TV personality Kate Gosselin.
Jeff Bridges, Adam Lambert
Dane Cook
Julie Scardina, African Children's Choir
Tim Allen
Actor Tim Allen; TV personality Adam Carolla.
Kim Kardashian, Jillian Michaels, Guy Fieri
TV personality Kim Kardashian; TV personality Jillian Michaels.
Hugh Jackman, Katie Couric
Actor Hugh Jackman; journalist Katie Couric.
Denzel Washington
Actor Denzel Washington; comic Mikey Day.
Brian Williams
Journalist Brian Williams; correspondents Ross Matthews and Mikey Day.
Bill Cosby
Sandra Bullock
Sandra Bullock, Anderson Cooper
Heidi Klum
Heidi Klum, Kourtney Kardashian
Dwayne Johnson
Dwayne Johnson, Jimmy Kimmel
Julianne Moore
Julianne Moore, Ricky Gervais
Emily Blunt
Chelsea Handler
TV show host Chelsea Handler; former professional basketball player Michael Jordan.
James Cameron
Director James Cameron; actress Selena Gomez.
Billy Crystal
Actor Billy Crystal; actress Zoe Saldana.
Mark Harmon
Actor Mark Harmon and Alonzo Bodden
Mel Gibson
Actor Mel Gibson.
Bill Paxton
Actor Bill Paxton, Sen. Scott Brown (R-Mass.).
Howie Mandel
TV show host Howie Mandel.
Jessica Alba
Actress Jessica Alba; Olympian John Shuster.
Jessica Biel
Actress Jessica Biel; TV host Jimmy Fallon.
Wanda Sykes
TV host Wanda Sykes; Olympic figure skater Evan Lysacek.
Bill Maher, Gretchen Bleiler
Emma Roberts, Charles Barkley
Series Finale: Ashton Kutcher, Bob Costas, Gabourey Sidibe