S17 E1: William Shatner; Chelsea Handler; Newton Faulkner

S17 E2: Liv Tyler; Judd Apatow; Usher

S17 E3: Jeff Foxworthy; Arianna Huffington; N.E.R.D.

S17 E4: Dustin Hoffman; Gordon Ramsay; Flobots

S17 E5: Will Smith; Pete Sampras; Ed Harcourt

S17 E6: Russell Brand; Bill Engvall; Aimee Mann

S17 E7: Justin Timberlake; Karen Allen; Sheryl Crow

S17 E8: Dana Carvey; Spencer Breslin; Priscilla Ahn

S17 E9: Mike Myers; Abigail Breslin; David Cook

S17 E10: Larry the Cable Guy; Bob Costas; Ashanti

S17 E11: Anne Hathaway; Gabriel Iglesias; Amos Lee

S17 E12: Don Rickles; Charles Barkley, Kenny Smith, Ernie Johnson; Jewel

S17 E13: The Rock; Tom Papa; Against Me!

S17 E14: Wanda Sykes; James McAvoy; Duffy

S17 E15: Bette Midler; Al Roker; Bette Midler

S17 E16: Selma Blair; Kevin Nealon; Steve Tyrell

S17 E17: Aaron Eckhart; Los Lonely Boys; Dara Torres

S17 E18: Sara Bareilles; Jarod Miller

S17 E19: Adam Carolla; Kathy Griffin; Wynton Marsalis; Willie Nelson

S17 E20: Elizabeth Banks; Michael Caine

S17 E21: Will Ferrell; Mary McCormack; James Hunter

S17 E22: David Duchovny; Reese Hoffa; Jakob Dylan

S17 E23: John C. Reilly; Venus Williams; Gavin Rossdale

S17 E24: David Spade; Jordana Spiro; Coldplay

S17 E25: Tim Allen; Demi Lovato; One Republic

S17 E26: Kyra Sedgewick; Chris Matthews; Alanis Morissette

S17 E27: Gillian Anderson; Dave Attell; The Duke Spirit

S17 E28: Kevin Costner; D.L. Hughley; The Time

S17 E29: Kelsey Grammer; Hugh Rowland; Drew Sherwood; Gavin Degraw

S17 E30: Kevin Spacey; Triumph the Insult Comic Dog; Jesse McCarthy

S17 E31: Julie Scardina; Brendan Fraser; Gnarls Barkley

S17 E32: Seth Rogen; Joan Allen; Third Day

S17 E33: Rainn Wilson; Emeril Lagasse; Sergio Mendes Ft. Ledisi

S17 E34: Rosie Perez; Robin Thicke

S17 E35: Bill Cosby; Emma Stone

S17 E36: Ben Stiller; the Jonas Brothers

S17 E37: Robert Downey Jr.; Anna Faris; Toby Keith

S17 E38: Jack Black; Conor Oberst

S17 E39: Nick Nolte; Solomon Burke

S17 E40: Scarlett Johansson; Luke Ford; Chris Cornell

S17 E41: John McCain; Dara Torres; Juliana Hatfield

S17 E42: Norm MacDonald; Gordon Ramsay; B.B. King

S17 E43: Bill Maher; Low vs Diamond

S17 E46: Josh Brolin, Chelsea Handler, The Killers

S17 E47: Heidi Klum, Robert Pattinson, Seal

S17 E48: Debra Messing, Cody Willard, Celine Dion

S17 E49: Kathy Griffin, David Frost, Colbie Caillat

S17 E50: Michael Phelps, JB Smoove

S17 E51: Brian Williams, Kirk Fox, Common

S17 E52: Cate Blanchett, Tim Reid & Tom Dreesen, Taylor Swift

S17 E53: Will Smith, Paula Deen, k.d. lang

S17 E55: Kate Beckinsale, Sean "Diddy" Combs, Sara Bareilles & Ingrid Michaelson

S17 E56: Wanda Sykes, Michael Phelps, Lyle Lovett

S17 E57: Jamie Foxx, David Gregory

S17 E58: Kate Winslet, Dame Edna, Sheryl Crow

S17 E59: Jim Carrey, Rosario Dawson, Relient K

S17 E60: Charlize Theron; Matt Lucas & David Walliams

S17 E61: Adam Sandler, Zooey Deschanel, Los Lonely Boys

S17 E62: James Franco, Doris Kearns Goodwin, Melissa Etheridge

S17 E64: Owen Wilson, Julie Scardina, Natalie Cole

S17 E65: Terry Bradshaw, Jack Witherspoon, Iron & Wine

S17 E66: Queen Latifah, Adam Carolla, Pussycat Dolls

S17 E67: Anne Hathaway, Brady Barr, Jeff Dunham

S17 E68: Dustin Hoffman, Mary Lynn Rajskub, Lady GaGa

S17 E69: Daniel Craig, Taraji P. Henson, Eagles of Death Metal

S17 E70: David Duchovny, Richard Roeper, The All-American Rejects

S17 E71: Mickey Rourke, Toni Collette, John Legend

S17 E72: Cherie Blair, Ralph Fiennes, Brett Dennen

S17 E73: Kevin James, Emma Roberts, MuteMath

S17 E74: Hugh Laurie, Chuck Todd, Band From TV

S17 E75: Jimmy Fallon, Neil DeGrasse Tyson, Lee Ann Womack

S17 E76: Wanda Sykes, Bernice Gallego, Buckcherry

S17 E77: Howie Mandel, Jerome Bettis, Lady Antebellum

S17 E79: Marisa Tomei, Dr. Grey Stafford, Ty Barnett

S17 E80: Michelle Obama; Chris Rock; Darius Rucker

S17 E81: Rainn Wilson, Nikki Glaser, Hoobastank

S17 E82: Dakota Fanning, Bradley Cooper, the Neville Brothers

S17 E83: Jenna Fischer, Justin Long, Franz Ferdinand

S17 E84: Elizabeth Banks, Dev Patel, James Morrison

S17 E85: Kate Winslet, Danny Boyle, Akon

S17 E86: Penelope Cruz, D.L. Hughley, Sara Bareilles

S17 E87: Drew Barrymore, Serena Williams, will.i.am

S17 E88: Jennifer Aniston, Santonio Holmes, Jamey Johnson

S17 E89: Dave Salmoni, Frank Langella, Ben Lee

S17 E90: Simon Baker, Heidi Montag and Spencer Pratt, Duffy

S17 E91: Bill Maher, Viola Davis, Raphael Saadiz

S17 E92: Anderson Cooper; Steve Byrne; Sarah McLachlan

S17 E93: Miley Cyrus; Jason Statham; David Cook

S17 E94: Kiefer Sutherland; Lisa Lampanelli; Barry Manilow

S17 E95: Larry the Cable Guy, Chris Matthews, Adele

S17 E96: Bill Maher, Kristin Chenoweth, Nickelback

S17 E97: Hugh Jackman, Tenacious D

S17 E98: Jay Mohr, Marjorie Johnson, Scott Weiland

S17 E99: Ron Howard, Jonas Brothers

S17 E100: Larry the Cable Guy, Malin Akerman, the Fray

S17 E101: Bob Newhart, Rachel Maddow, Bettye Lavette

S17 E102: Russell Brand, Neko Case

S17 E103: Jarrod Miller, Sienna Miller, Tom Jones

S17 E104: Christina Ricci, Papa Roach

S17 E105: Elisabeth Hasselbeck, Demetri Martin, Rocco De Luca & The Burden

S17 E106: Whoopi Goldberg, Elle Fanning, Keyshia Cole

S17 E107: Ellen DeGeneres, Christopher Mintz, Raul Malo

S17 E108: Dwayne Johnson, Heather Headley

S17 E109: John Krasinski, Kara DioGuardi, Randy Travis

S17 E110: Tom Cruise, Frank Caliendo, The Cure

S17 E111: Portia de Rossi, D.L. Hughley, Soundtrack of Our Lives

S17 E112: Reese Witherspoon, Keith Olbermann, Naturally 7

S17 E113: President Barack Obama, Garth Brooks

S17 E117: Robin Williams, Freida Pinto, Johnny Mathis

S17 E151: Charlie Sheen, Arianna Huffington, Lisa Hannigan

S17 E168: Seth Rogen, Guy Fieri, Chris Cornell

S17 E169: Simon Cowell, Randy Jackson, Ryan Seacrest, John Cena, Playing For Change

S17 E170: Condoleezza Rice, Bill Hader, PJ Harvey & John Parish

S17 E171: Halle Berry, Frank Caliendo, Prince

S17 E172: Paul Giamatti, Emma Roberts, Prince

S17 E173: Dana Carvey, Billy Mays, Prince

S17 E174: Vin Diesel, Lisa Lampanelli, Gavin DeGraw

S17 E175: Amy Poehler, Paul Walker, Fall Out Boy

S17 E176: Michael Caine, Dennis Rodman, Christopher Guest, Michael McKean, Harry Shearer

S17 E177: Ben Affleck, Taylor Swift

S17 E178: Miley Cyrus, Tom Lennon

S17 E179: Sen. John McCain, Kristin Chenoweth, Billy Ray Cyrus

S17 E180: Jamie Foxx, Carol Leifer, the Airborne Toxic Event

S17 E181: Don Rickles, Richard Engel, Chris Botti featuring John Mayer

S17 E182: Jessica Alba, Bob Saget, Jonny Lang

S17 E183: Charles Barkley, Leslie Mann, TV on the Radio

S17 E184: Martha Stewart, Tracey Ullman, the Killers

S17 E185: Hugh Jackman, Abigail Breslin, Ida Maria

S17 E186: Robert Downey Jr., Alexandra Wentworth, George Wallace

S17 E187: Eric Bana, Marjorie Johnson, Big Bad Voodoo Daddy

S17 E188: Michael Douglas, Chelsea Handler, Country Bones

S17 E189: Jimmy Fallon, Chris Matthews, Zac Brown Band

S17 E190: Matthew McConaughey, Earvin "Magic" Johnson, Starsailor

S17 E191: Arsenio Hall, Jules Sylvester, Ziggy Marley

S17 E192: Anderson Cooper, Kathleen Madigan, Eli Young Band

S17 E193: Howie Mandel, Alec Greven, Robert Randolph & the Clark Sisters

S17 E194: Tim Allen, John Cho, Van Morrison

S17 E195: Adam Sandler, Judd Apatow, Soulja Boy Tellem

S17 E196: Jamie Lee Curtis, Jonah Hill, Jewel

S17 E197: Russell Brand, Elizabeth Banks, Ciara

S17 E198: Dennis Miller, Calvin Borel, Kelly Clarkson

S17 E199: Kevin Spacey, Roberta McCain, Yusuf

S17 E200: Katie Couric, Ewan McGregor, the Decemberists

S17 E201: Kevin Bacon, Julie Scardina, Kings of Leon

S17 E202: Cameron Diaz, Kirk Fox, Blink 182

S17 E203: Terry Bradshaw, 8-year-old piano prodigy Ethan Bortnick, Blink 182

S17 E204: Bill Maher, Adam Richman, Mandy Moore

S17 E205: Andy Samberg, "American Idol" winner Kris Allen, Lionel Richie

S17 E206: Brian Williams, Jesse James, Tori Amos

S17 E207: Mel Gibson, Lyle Lovett

S17 E208: Gov. Arnold Schwarzenegger, Dwight Yoakam

S17 E209: Wanda Sykes, Sarah McLachlan

S17 E210: Billy Crystal, Prince

S17 E211: Conan O'Brien, James Taylor

S17 E212: 17 Dec. 2008