Season 16

Guest Stars:

Amanda Bynes, Emmylou Harris, Howie Mandel

Guest Stars:

Paolo Nutini, Tim Gunn, Jamie Foxx

Guest Stars:

Dane Cook, Ali Larter

Guest Stars:

Jessica Alba, D.L. Hughley

Guest Stars:

Sherri Shepherd, Hugh Laurie

Guest Stars:

Diana Krall, Dennis Kucinich

Guest Stars:

Jennifer Love Hewitt, Reba McEntire, Jeff Corwin, Vince Gill

Guest Stars:

Madison Pettis

Guest Stars:

Tony Snow, Raul Midón, Ben Stiller

Guest Stars:

Teri Hatcher, Kevin McKidd, Queen Latifah

Guest Stars:

Patricia Heaton, Tori Amos, Emeril Lagasse

Guest Stars:

Tom Selleck, Carlos Mencia, Willie Nelson, Bob Nelson

Guest Stars:

George Carlin, Eva Mendes

Guest Stars:

Tyler Perry, Annie Lennox, Cate Blanchett

Guest Stars:

Jim Norton, Ben Affleck

Guest Stars:

Jaime Pressly

Guest Stars:

Malin Åkerman, Dana Carvey

Guest Stars:

Vanessa Carlton, Joaquin Phoenix, Gordon Ramsay

Guest Stars:

Christina Applegate, Bill O'Reilly, Alicia Keys

Guest Stars:

James Spader, Gloria Estefan, Lara Logan

Guest Stars:

PJ Harvey, Reese Witherspoon, David Koechner

Guest Stars:

Alison Sweeney, Jerry Seinfeld

Guest Stars:

Greg Grunberg, Halle Berry, Dwight Yoakam

Guest Stars:

Carrie Underwood, Russell Crowe, Jenna Bush Hager

Guest Stars:

Barry Manilow, Eva Mendes

Guest Stars:

Denzel Washington, LeAnn Rimes

Guest Stars:

Manny Ramírez

Guest Stars:

Mike Huckabee, Chingy, Emeril Lagasse

Guest Stars:

Joe Nichols, Jason Lewis, Howie Mandel

Guest Stars:

Blake Lewis

Guest Stars:

Maria Bartiromo, Jules Sylvester

Guest Stars:

Elon Gold, Jimmy Kimmel

Guest Stars:

Jordin Sparks, Marilu Henner

Guest Stars:

Jill Scott, Chris Matthews

Guest Stars:

D.L. Hughley, Sara Bareilles

Guest Stars:

Ryan Sheckler, Mitt Romney

Guest Stars:

Tavis Smiley, Shaggy, Ryan Seacrest, Simon Cowell

Guest Stars:

David Gregory

Guest Stars:

Shooter Jennings, Richard Roeper, Adam Carolla

Guest Stars:

Chelsea Handler

Guest Stars:

Ant, Natasha Bedingfield, Hulk Hogan

Guest Stars:

Alison Sweeney, Dierks Bentley, Chazz Palminteri

Guest Stars:

Lester Holt

Guest Stars:

Tom Green

Guest Stars:

Shelby Lynne, John McCain

Guest Stars:

Graham Colton, Terrell Owens, Tom Brokaw

Guest Stars:

Dan Rather, Mike Rowe, Josh Kelley

Guest Stars:

Stephen Baldwin

Guest Stars:

Frank Caliendo, Flo Rida

Guest Stars:

Paula Deen, James Blunt, Arsenio Hall

Guest Stars:

Ahmed Ahmed, Enrique Iglesias, Brian Williams

Guest Stars:

Bobby Knight, Andrea Bocelli, Larry the Cable Guy

Guest Stars:

MIKA, Joan Embery, Larry the Cable Guy

Guest Stars:

Russell Crowe, Willie Nelson, Larry the Cable Guy

Guest Stars:

Russell Peters, Kristin Chenoweth

Guest Stars:

Reese Witherspoon

Guest Stars:

Hayden Christensen, Will Ferrell

Guest Stars:

Christina Ricci, Garth Brooks

Guest Stars:

Heidi Klum, James McAvoy

Guest Stars:

Bill O'Reilly

Guest Stars:

Catherine O'Hara, Tift Merritt, Eric Bana

Guest Stars:

Lupe Fiasco, Dennis Quaid, David Koechner

Guest Stars:

Cat Power, Wanda Sykes

Guest Stars:

Dominic Monaghan, Sheryl Crow

Guest Stars:

Bob Saget, America Ferrera

Guest Stars:

Novak Đoković, Landon Pigg, Bill Cosby

Guest Stars:

Minnie Driver, Howie Mandel

Guest Stars:

Naomi Watts, Christian Siriano, Gavin DeGraw

Guest Stars:

Carlos Mencia, Kate Beckinsale

Guest Stars:

Mary Matalin, Erykah Badu, James Carville, Terry Bradshaw

Guest Stars:

Jim Lauderdale, Ryan Phillippe, Lisa Lampanelli

Guest Stars:

Leslie Mann, John Edwards

Guest Stars:

Geraldo Rivera, Adam Carolla

Guest Stars:

Peter O'Toole, Katt Williams

Guest Stars:

José González, Joe Torre, John Krasinski

Guest Stars:

Allison Moorer, Anderson Cooper, Conan O'Brien

Guest Stars:

K.D. Lang, John Krasinski

Guest Stars:

Jodie Foster, Cedric the Entertainer

Guest Stars:

Ani DiFranco, Kathie Lee Gifford

Guest Stars:

Hillary Clinton, Patton Oswalt

Guest Stars:

Ben Lee

Guest Stars:

Keanu Reeves, Chelsea Handler

Guest Stars:

William Shatner

Guest Stars:

Mark Harmon, Ray J

Guest Stars:

Brad Garrett, Ingrid Michaelson

Guest Stars:

Charles Barkley

Guest Stars:

John Cho, Ewan McGregor, Kal Penn

Guest Stars:

Ashlee Simpson, Norm Macdonald

Guest Stars:

Julia Louis-Dreyfus, Jason Segel, Michael McShae

Guest Stars:

Patrick Dempsey, Ed Begley Jr.

Guest Stars:

Marilu Henner, Arnold Schwarzenegger

Guest Stars:

Hugh Laurie, Prince

Guest Stars:

Duffy, Helen Hunt

Guest Stars:

Phil McGraw, Natasha Bedingfield

Guest Stars:

Cindy McCain, Ed Helms

Guest Stars:

Robin Williams, Serj Tankian, Terrence Howard

Guest Stars:

Jesse Ventura, Sally Field

Guest Stars:

Carlos Mencia, Robert Downey Jr.

Guest Stars:

Christina Ricci, KT Tunstall

Guest Stars:

Jon Favreau, Jimmy Carter

Guest Stars:

Robert Schimmel, Trace Adkins, Jenna Fischer

Guest Stars:

Harrison Ford, Carly Simon, William Moseley

Guest Stars:

Clay Aiken, Jack Black

Guest Stars:

Ben Barnes, Evangeline Lilly

Guest Stars:

Howard Dean, Kate Nash, Rainn Wilson

Guest Stars:

Dana Delany, Dwight Yoakam, Adam Carolla

Guest Stars:

Matthew Fox, Kathleen Edwards

Guest Stars:

Rob Schneider, Josh Groban

Guest Stars:

Sylvester Stallone, Jason Mraz

Guest Stars:

Hilary Duff, Al Green

Guest Stars:

David Cook, Jenna Bush Hager, Laura Bush, Tristan Prettyman

Guest Stars:

Colbie Caillat, Terry Bradshaw

Guest Stars:

Chelsea Handler, William Shatner

Guest Stars:

Usher, Judd Apatow, Liv Tyler

Guest Stars:

Jeff Foxworthy, Arianna Huffington

Guest Stars:

Pete Sampras, Will Smith

Guest Stars:

Aimee Mann, Bill Engvall, Russell Brand

Guest Stars:

Karen Allen, Sheryl Crow, Justin Timberlake

Guest Stars:

Dana Carvey, Spencer Breslin

Guest Stars:

David Cook, Mike Myers

Guest Stars:

Bob Costas, Ashanti, Larry the Cable Guy

Guest Stars:

Gabriel Iglesias, Anne Hathaway

Guest Stars:

Duffy, James McAvoy, Wanda Sykes

Guest Stars:

Bette Midler, Al Roker

Guest Stars:

Selma Blair, Kevin Nealon, Steve Tyrell

Guest Stars:

Aaron Eckhart, Dara Torres

Guest Stars:

Sara Bareilles

Guest Stars:

Rosie Perez, Robin Thicke

Guest Stars:

Robert Downey Jr., Toby Keith, Anna Faris

Guest Stars:

Jack Black, Conor Oberst

Guest Stars:

Nick Nolte, Carrot Top, Solomon Burke

Guest Stars:

Hugh Laurie, Prince

Guest Stars:

John McCain, Dara Torres

Guest Stars:

Norm Macdonald, Nastia Liukin, B.B. King

Guest Stars:

Bill Maher, Henry Cejudo

Guest Stars:

Gordon Ramsay, Missy Higgins, Natalie Coughlin

Guest Stars:

Arsenio Hall, Chuck Berry

Guest Stars:

Eva Longoria, Ingrid Michaelson, Russell Brand

Guest Stars:

Billy Bob Thornton, Ethan Bortnick

Guest Stars:

Howie Mandel, Sanya Richards-Ross

Guest Stars:

Robert Schimmel, Trace Adkins, Jenna Fischer

Guest Stars:

Harrison Ford, Carly Simon

Guest Stars:

Annette Bening, Jules Sylvester

Guest Stars:

Matthew McConaughey, T. Boone Pickens, Al Green

Guest Stars:

Jamie Lee Curtis, Jerome Bettis, Alejandro Escovedo

Guest Stars:

Raphael Saadiq, Hugh Laurie, Barry Humphries

Guest Stars:

Matthew Fox, Kathleen Edwards

Guest Stars:

Rob Schneider, Josh Groban, Simon Cowell

Guest Stars:

Sylvester Stallone, Jason Mraz

Guest Stars:

Adam Sandler, Hilary Duff, Al Green

Guest Stars:

Jenna Bush Hager, Laura Bush, Tristan Prettyman

Guest Stars:

Colbie Caillat, Terry Bradshaw

Guest Stars:

Ellen DeGeneres, Jerry O'Connell