S16 E1: Howie Mandel, Amanda Bynes, Emmylou Harris

S16 E2: Jamie Foxx, Tim Gunn, Paolo Nutini

S16 E3: Dane Cook, Ali Larter, LCD Soundsystem

S16 E4: Jessica Alba, D.L. Hughley, Cold War Kids

S16 E5: Hugh Laurie, Sherri Shepherd, The Editors

S16 E6: Dwayne "The Rock" Johnson, Dennis Kucinich, Diana Krall

S16 E7: Jennifer Love Hewitt, Jeff Corwin, Reba McEntire with Vince Gill

S16 E8: Steve Carell, Madison Pettis, Bright Eyes

S16 E9: Ben Stiller, Tony Snow, Raul Midon

S16 E10: Teri Hatcher, Kevin McKidd, Queen Latifah

S16 E11: Patricia Heaton, Emeril Lagasse, Tori Amos

S16 E13: Tom Selleck, Carlos Mencia, Bobbie and Willie Nelson

S16 E14: John Larroquette, Chelsea Handler, Matchbox Twenty

S16 E15: Cate Blanchett, Tyler Perry, Annie Lennox

S16 E16: Ben Affleck, Jim Norton, The Shins

S16 E17: Jaime Pressly, Brady Barr, Blue Man Group

S16 E18: Dana Carvey, Malin Akerman, Plain White T's

S16 E19: Joaquin Phoenix, Gordon Ramsay, Vanessa Carlton

S16 E20: Christina Applegate, Bill O'Reilly, Alicia Keys

S16 E21: James Spader, Lara Logan, Steve Byrne

S16 E22: Reese Witherspoon, David Koechner, PJ Harvey

S16 E23: Sen. Barack Obama, Orny Adams, Keith Urban

S16 E24: Jerry Seinfeld, Amy Ryan, Evanescence

S16 E25: Halle Berry, Greg Grunberg, Dwight Yoakam

S16 E26: Russell Crowe, Jenna Bush, Carrie Underwood

S16 E27: Tom Cruise, Rep. Ron Paul, Sex Pistols

S16 E28: Eva Mendes, Marjorie Johnson, Barry Manilow

S16 E29: Denzel Washington, Dave Salmoni, LeAnn Rimes

S16 E30: Steve Carell, Manny Ramirez, Backstreet Boys

S16 E31: Gov. Mike Huckabee, Emeril Lagasse, Chingy

S16 E32: Howie Mandel, Jason Lewis, Joe Nichols

S16 E33: Animals With Jarod Miller, John Caparulo, Blake Lewis

S16 E34: Ron Paul, Christopher Titus, Shakira

S16 E35: Pamela Anderson, Mary J. Blige

S16 E36: Jules Sylvester and animals, Maria Bartiromo, Finger Eleven

S16 E37: Jimmy Kimmel, Elon Gold, OneRepublic

S16 E38: Arsenio Hall, Melanie Metz & Peggy Willenberg, Seether

S16 E39: Marilu Henner, Brady Barr, Jordan Sparks

S16 E40: Bill Maher, Carrie Ann Inaba & Bruno Tonioli, Taylor Swift

S16 E41: Chris Matthews, John Roy, Jill Scott

S16 E42: D.L. Hughley, Joe Ligotti, Sara Bareilles

S16 E43: Mitt Romney, Ryan Sheckler, Jonas Brothers

S16 E44: Simon Cowell & Ryan Seacrest, Tavis Smiley, Shaggy

S16 E45: David Gregory, Performing Birds, Puddle Of Mudd

S16 E46: Adam Carolla, Richard Roeper, Shooter Jennings

S16 E47: Animals With Julie Scardina, Chelsea Handler, Buckcherry

S16 E48: Hulk Hogan, Mad Scientist David Willey, Natasha Bedingfield

S16 E49: Chazz Palminteri, Alison Sweeney, Dierks Bentley

S16 E50: Lester Holt, Blue Ribbon Baker Marjorie Johnson, Raheem DeVaughn

S16 E51: Animals with Dave Salmoni, Tom Green, Maroon 5

S16 E52: Sen. John McCain, Rudy Giuliani, Shelby Lynne

S16 E53: Tom Brokaw, Terrell Owens, Graham Colton

S16 E54: Dan Rather, Mike Rowe, Josh Kelley

S16 E55: Insects with Brent Karner, Stephen Baldwin, J. Holiday

S16 E56: Frank Caliendo, Chimp Rescuer Eugene Cussons, Flo Rida

S16 E57: Arsenio Hall, Paula Deen, James Blunt

S16 E58: Brian Williams, Ahmed Ahmed, Enrique Iglesias

S16 E59: Larry the Cable Guy, Bobby Knight, Andrea Bocelli

S16 E60: Larry the Cable Guy, Bruno Tonioli, Glen Hansard & Markéta Irglová

S16 E61: Joan Embery and Animals, Larry the Cable Guy, Mika

S16 E62: Russell Crowe, Larry the Cable Guy, Willie Nelson

S16 E63: Kristen Chenoweth, Russell Peters, Lifehouse

S16 E64: Reese Witherspoon, Alex Cambert, Gary Allan

S16 E65: Will Ferrell, Hayden Christensen, The Hives

S16 E66: Garth Brooks, Christina Ricci

S16 E67: Heidi Klum, James McAvoy, John Fogerty

S16 E68: Colin Farrell, Bill O'Reilly, Herbie Hancock

S16 E69: Eric Bana, Catherine O'Hara, Tift Merritt

S16 E70: Dennis Quaid, David Koechner, Lupe Fiasco

S16 E71: Billy Ray Cyrus, Miley Cyrus, Brooke Shields

S16 E72: Wanda Sykes, Bryan Cranston, Cat Power

S16 E73: Dave Salmoni and Animals, Patricia Arquette, The Punch Brothers

S16 E74: Dominic Monaghan, Ethan Bortnick, Sheryl Crow

S16 E75: America Ferrera, Bob Saget, The Blind Boys of Alabama

S16 E76: Bill Cosby, Novak Djokovic, Landon Pigg

S16 E77: Howie Mandel, Minnie Driver

S16 E78: Gordon Ramsay

S16 E79: Kate Beckinsale, Carlos Mencia, The Bravery

S16 E80: Terry Bradshaw, James Carville & Mary Matalin, Michael McDonald

S16 E81: Ryan Phillippe, Lisa Lampanelli, Jim Lauderdale

S16 E82: John Edwards, Leslie Mann, Nada Surf

S16 E83: Adam Carolla, Geraldo Rivera, The Black Crowes

S16 E84: Peter O'Toole, Katt Williams, Leona Lewis

S16 E85: Abigail Breslin, Seth Meyers, Steve Earle

S16 E86: John Krasinski, Joe Torre, José González

S16 E87: Conan O'Brien, Anderson Cooper, Allison Moorer

S16 E88: John Larroquette, Kid Inventors, k.d. lang

S16 E89: Jodie Foster, Cedric the Entertainer, Lili Haydn

S16 E90: Mike Huckabee; Emeril Lagasse; Chingy

S16 E91: Steve Carell, Kathie Lee Gifford, Ani DiFranco

S16 E92: Sen. Hillary Clinton, Patton Oswalt, Ferras

S16 E93: David Spade, Nora Hardwick, Ben Lee

S16 E94: Pamela Anderson; Mary J. Blige

S16 E95: Jules Sylvester; Maria Bartiromo; Finger Eleven

S16 E96: Jimmy Kimme; Elon Gold; OneRepublic

S16 E97: Keanu Reeves, Chelsea Handler, The Redwalls

S16 E98: William Shatner, Tricia Helfer, Ryan Bingham

S16 E99: Mark Harmon, Corbin Maxey, Ray J

S16 E100: Brad Garret; Ingrid Michaelson; John Melendez

S16 E101: Charles Barkley, The Young@Heart Chorus

S16 E102: Ewan McGregor, John Cho & Kal Penn, Seether

S16 E103: Tracey Ullman, Jason Taylor, Flogging Molly

S16 E104: Dave Salmoni, Norm MacDonald, Ashlee Simpson

S16 E105: Julia Louis-Dreyfus, Jason Segel, Goldfrapp

S16 E106: Patrick Dempsey, Ed Begley Jr., Tegan and Sara

S16 E107: Gov. Arnold Schwarzenegger, Marilu Henner, Old 97's

S16 E108: Hugh Laurie, Doug Fine, Prince

S16 E109: Helen Hunt, Gov. Bobby Jindal, Duffy

S16 E110: Dr. Phil McGraw, the Lopez family, Natasha Bedingfield

S16 E111: Cindy McCain, Ed Helms, Augustana

S16 E112: Robin Williams, Terrence Howard, Serj Tankian

S16 E113: Sally Field, Jesse Ventura, Sleepercar

S16 E114: Robert Downey Jr., Carlos Mencia, Rascal Flatts

S16 E115: Julie Scardina and animals, Christina Ricci, KT Tunstall

S16 E116: Former President Jimmy Carter, Jon Favreau, P.O.D.

S16 E117: Jenna Fischer, Robert Schimmel, Trace Adkins

S16 E118: Harrison Ford, William Moseley, Carly Simon

S16 E119: Jack Black, Clay Aiken

S16 E120: Evangeline Lilly, Ben Barnes, Switchfoot

S16 E121: Rainn Wilson, Howard Dean, Kate Nash

S16 E122: Dana Delany, Adam Carolla, Dwight Yoakam

S16 E123: Matthew Fox, Kathleen Edwards

S16 E124: Simon Cowell, Rob Schneider, Josh Groban

S16 E125: Sylvester Stallone, Irma & Ray Ziff, Jason Mraz

S16 E126: Adam Sandler, Hilary Duff, Al Green

S16 E127: Laura & Jenna Bush, David Cook, Tristan Prettyman

S16 E128: Terry Bradshaw, Turkey Baster Virtuoso Ray Sanders, Colbie Caillat

S16 E129: William Shatner, Chelsea Handler, Newton Faulkner

S16 E130: Liv Tyler, Judd Apatow, Usher

S16 E131: Jeff Foxworthy, Arianna Huffington, N.E.R.D.

S16 E132: Dave salmoni; Patricia Arquette; Punch Brothers

S16 E133: Will Smith, Pete Sampras, Ed Harcourt

S16 E134: Russel Brand, Bill Engvall, Aimee Mann

S16 E135: Justin Timberlake, Karen Allen, Sheryl Crow

S16 E136: Dana Carvey, Spencer Breslin, Priscilla Ahn

S16 E137: Mike Myers, Abigail Breslin, David Cook

S16 E138: Larry the Cable Guy, Bob Costas, Ashanti

S16 E139: Anne Hathaway; Gabriel Iglesias; Amos Lee

S16 E140: Ryan Phillippe; Lisa Lampanelli; Jim Lauderdale

S16 E141: Dwayne "The Rock" Johnson, Tom Papa, Against Me!

S16 E142: Wanda Sykes, James McAvoy, Duffy

S16 E143: Bette Midler, Al Roker

S16 E144: Selma Blair, Kevin Nealon, Steve Tyrell

S16 E145: Aaron Eckhart, Dara Torres, Los Lonely Boys

S16 E146: Animal Expert Jarod Miller, David Koechner, Sara Bareilles

S16 E147: Conan O'Brien; Anderson Cooper; Allison Moorer

S16 E148: John Larroquette; Kid Inventors; K.D. Lang

S16 E149: Jodie Foster; Cedric the Entertainer; Lili Hayden

S16 E150: David Beckham; Sherri Shepherd; B-52s

S16 E151: Steve Carell; Kathie Lee Gifford; Ani LiFranco

S16 E152: Hillary Clinton; Patto Oswalt; Ferras

S16 E153: David Spade; Nora Hardwick; Ben Lee

S16 E154: Thomas Haden Church; Sig & Edgar Hansen; Jimmy Eat World

S16 E155: Dennis Quaid; Russell Brand; Brett Dennen

S16 E156: Ellen Page; Donny & Marie Osmond; Angie Stone

S16 E157: Keanu Reeves; Chelsea Handler; The Redwalls

S16 E158: William Shatner; Tricia Helfer; Ryan Bingham

S16 E159: Mark Harmon; Corbin Maxey; Ray J

S16 E160: Brad Garrett; John Melendez; Ingrid Michaelson

S16 E161: Charles Barkley; Young @ Heart Chorus

S16 E162: Rosie Perez, Robin Thicke

S16 E163: Bill Cosby, Emma Stone, John Mellencamp with T Bone Burnett

S16 E164: Ben Stiller, Jonas Brothers

S16 E165: Robert Downey Jr., Anna Faris, Toby Keith

S16 E166: Jack Black, Pillsbury Bake-Off-Champ Carolyn Gurtz, Conor Oberst

S16 E167: Nick Nolte, Carrot Top, Solomon Burke

S16 E168: Hugh Laurie; Doug Fine; Prince

S16 E169: Sen. John McCain, Dara Torres, Juliana Hatfield

S16 E170: Norm MacDonald, Nastia Liukin, B.B. King

S16 E171: Bill Maher, Henry Cejudo, Low vs Diamond

S16 E172: Gordon Ramsay, Natalie Coughlin, Missy Higgins

S16 E173: Arsenio Hall, Shawn Johnson, Chuck Berry

S16 E174: Russell Brand, Eva Longoria Parker, Ingrid Michaelson

S16 E175: Billy Bob Thornton, Ethan Bortnick, Brian Wilson

S16 E176: Howie Mandel, Sanya Richards, The Game

S16 E177: Jenna Fischer; Robert Schimmel; Trace Adkins

S16 E178: Harrison Ford; William Moseley; Carly Simon

S16 E179: Jules Sylvester, Annette Bening, Leona Lewis

S16 E180: Matthew McConaughey, T. Boone Pickens, Al Green

S16 E181: Jamie Lee Curtis, Jerome Bettis, Alejandro Escovedo

S16 E182: Hugh Laurie, Dame Edna, Raphael Saadiq

S16 E183: Matthew Fox; Kathleen Edwards

S16 E184: Simon Cowell; Rob Schneider; Josh Groban

S16 E185: Sylvester Stallone; Irma & Ray Ziff; Jason Mraz

S16 E186: Adam Sandler; Hillary Duff; Al Green

S16 E187: Laura & Jenna Bush; David Cook; Tristan Prettyman

S16 E188: Terry Bradshaw; Ray Sanders; Colbie Caillat

S16 E194: Ellen Degeneres; Jerry O'Connell; Jazmine Sullivan