Season 12

Guest Stars:

Jason Bateman, Al Franken

Guest Stars:

James Spader, Amy Poehler, Kenny Hotz

Guest Stars:

Chad Michael Murray

Guest Stars:

Dave Navarro

Guest Stars:

Trey Parker, Seth Meyers, Matt Stone

Guest Stars:

Al Roker, Tracy Morgan

Guest Stars:

Sarah Michelle Gellar

Guest Stars:

Jay-Z, Jerry O'Connell

Guest Stars:

Billy Connolly, Kevin Spacey

Guest Stars:

Paul Levesque, Liam Neeson, Avril Lavigne

Guest Stars:

Téa Leoni, Marc Maron

Guest Stars:

Susie Essman, Darrell Hammond

Guest Stars:

Maura Tierney, Samuel L. Jackson

Guest Stars:

Patrick Wilson, John Mayer, Twista

Guest Stars:

Topher Grace, Nia Long, Jim Gaffigan

Guest Stars:

Dennis Quaid

Guest Stars:

Joss Stone, Heidi Klum, Harland Williams

Guest Stars:

Ray LaMontagne, Ice Cube, Carmen Electra

Guest Stars:

Ethan Hawke, Randy Jackson

Guest Stars:

Nicole Richie, John Leguizamo

Guest Stars:

Jeffrey Tambor, Alan Alda

Guest Stars:

Mekhi Phifer, Donald Trump, Demetri Martin

Guest Stars:

Jimmy Buffett, Brian Williams

Guest Stars:

Dermot Mulroney, Jem, Sharon Osbourne

Guest Stars:

Will Forte

Guest Stars:

Mark Burnett, Kevin James

Guest Stars:

Jason Bateman, Caroline Rhea

Guest Stars:

Josh Duhamel, Seth Green

Guest Stars:

Alan Cumming, Gavin Rossdale

Guest Stars:

Jamie Kennedy, Tom Selleck, Kenny Chesney

Guest Stars:

Hilary Swank, Lee Ann Womack, Roger Ebert

Guest Stars:

Emo Philips

Guest Stars:

Rufus Wainwright, Rachel Weisz, Tom Arnold

Guest Stars:

Christina Ricci, Artie Lange

Guest Stars:

Barbara Walters

Guest Stars:

Jesse Eisenberg, Tyra Banks

Guest Stars:

Christina Milian, Ben Lee

Guest Stars:

Brittany Snow

Guest Stars:

Fred Armisen, Vin Diesel

Guest Stars:

Sylvester Stallone, Ben Foster, Solomon Burke

Guest Stars:

Nigella Lawson, Robin Williams

Guest Stars:

Regina Spektor, Bruce Willis

Guest Stars:

John Lithgow, Kevin Pollak

Guest Stars:

Trace Adkins, Ozzy Osbourne

Guest Stars:

Johnnie Mae Young, Clive Owen

Guest Stars:

Benicio del Toro, Jordana Brewster

Guest Stars:

Mike Binder, Jessica Alba

Guest Stars:

Alicia Silverstone, Marc Broussard, Al Franken

Guest Stars:

Paul Wight, Zach Galifianakis, Queen Latifah

Guest Stars:

John Doe

Guest Stars:

Johnny Damon, Gisele Bündchen

Guest Stars:

Moby, Matthew McConaughey, John Stamos

Guest Stars:

Steve Zahn, Jack Gallagher, Fran Drescher

Guest Stars:

Sarah Vowell, Drew Barrymore, Barry Humphries

Guest Stars:

Christian Slater, Kristen Bell

Guest Stars:

Jimmy Fallon, Anderson Cooper, Lewis Black

Guest Stars:

Rachel Dratch, David Duchovny

Guest Stars:

Damon Dash, Jeff Goldblum

Guest Stars:

Ben Folds, Natascha McElhone

Guest Stars:

Ellen Barkin

Guest Stars:

Joe Jackson, John C. Reilly, Zooey Deschanel, Todd Rundgren

Guest Stars:

Gene Wilder, Amanda Peet

Guest Stars:

Martin Short, Ani DiFranco, Felicity Huffman

Guest Stars:

Don Cheadle, Jim Gaffigan, Elisha Cuthbert

Guest Stars:

Joe Perry, George Foreman

Guest Stars:

Jennifer Esposito, Jet Li

Guest Stars:

Matt Dillon, Al Roker

Guest Stars:

R. Brandon Johnson, Ryan Phillippe, Wanda Sykes, Dave Attell

Guest Stars:

Will Ferrell

Guest Stars:

James Spader, Robert Plant

Guest Stars:

Patricia Arquette, Donald Trump

Guest Stars:

Andy Richter, Matthew Fox, Nick Di Paolo

Guest Stars:

Christopher Meloni, Amy Poehler

Guest Stars:

Ted Danson

Guest Stars:

Billy Idol, Chris Rock, Evangeline Lilly

Guest Stars:

Amber Tamblyn, John McCain, Matt Skiba, Abe Vigoda

Guest Stars:

Dalip Singh

Guest Stars:

M.I.A., Juliette Lewis, Bill Bellamy

Guest Stars:

Michael Palin, Cedric the Entertainer

Guest Stars:

George López, Carson Daly

Guest Stars:

Kristin Davis, Russell Crowe

Guest Stars:

Christina Applegate, Regina Hall

Guest Stars:

Rudolph Giuliani, Colin Quinn

Guest Stars:

Mike Epps, Matt Lauer

Guest Stars:

Paul Giamatti, Heather Locklear

Guest Stars:

Roger Bart, John Pizzarelli, Tom Brokaw

Guest Stars:

Robbie Knievel, Bob Costas, Justin Long

Guest Stars:

Al Franken

Guest Stars:

Finesse Mitchell, Michael Chiklis

Guest Stars:

Ioan Gruffudd, Jennifer Connelly, Brian Regan

Guest Stars:

Tony Shalhoub, Leslie Feist, Greg Giraldo

Guest Stars:

Anthony Anderson, Dan Aykroyd

Guest Stars:

Jeffrey Tambor, Brian Berrebbi

Guest Stars:

DJ Qualls, Loudon Wainwright III, Lisa Kudrow

Guest Stars:

Jason Ritter, Rob Zombie, Brian Williams

Guest Stars:

Caroline Rhea, Owen Wilson

Guest Stars:

Billy Bob Thornton, Patton Oswalt

Guest Stars:

Michael Clarke Duncan, Carlos Mencia

Guest Stars:

John Tesh, John Leguizamo

Guest Stars:

Isla Fisher, Common, Tim Robbins

Guest Stars:

Ben McKenzie, David Feldman

Guest Stars:

Kevin Nealon, David Gray, Denis Leary

Guest Stars:

Johnny Knoxville

Guest Stars:

Jeff Goldblum, Marc Maron

Guest Stars:

Mark Wahlberg, Bob Saget

Guest Stars:

Kate Hudson, Paul Rudd

Guest Stars:

André 3000, Rob Schneider, Louis C.K.

Guest Stars:

Tommy Lee, Eva Longoria

Guest Stars:

Jason Mraz, Morgan Spurlock, Eric McCormack

Guest Stars:

Howie Mandel, Tom Arnold

Guest Stars:

Connie Nielsen

Guest Stars:

Heath Ledger, Gregg Rogell