Jamie Foxx, Lindsey Vonn, Brad Paisley (S18E1)
3/1/2010
Sarah Palin, Shaun White, Adam Lambert (S18E2)
3/2/2010
"Jaywalk All-Stars" with the cast of "Jersey Shore", Chelsea Handler, Apolo Anton Ohno, Avril Lavigne (S18E3)
3/3/2010
Brett Favre, Matthew McConaughey, Jason Reitman (S18E4)
3/4/2010
Morgan Freeman, Meredith Vieira (S18E5)
3/5/2010
Simon Cowell, Richard Roeper, Ben Harper (S18E6)
3/8/2010
Christoph Waltz, Dave Salmoni, Joan Jett & the Blackhearts (S18E7)
3/9/2010
Kristen Stewart, Guy Fieri, Ryan Bingham (S18E8)
3/10/2010
Dana Carvey, Kim Kardashian, Colbie Caillat (S18E9)
3/11/2010
Dakota Fanning, Judd Apatow, Katharine McPhee (S18E10)
3/12/2010
Terry Bradshaw, Kara DioGuardi, Ziggy Marley (S18E11)
3/15/2010
Hugh Jackman, Betty White, Collective Soul (S18E12)
3/16/2010
Dwayne Johnson, kid inventors, Switchfoot (S18E13)
3/17/2010
Janet Jackson, Clark Duke, Orianthi (S18E14)
3/18/2010
John Cusack, Heidi Montag, Barenaked Ladies (S18E15)
3/19/2010
Charles Barkley, Kenny Smith, Ernie Johnson, k.d. lang (S18E16)
3/22/2010
Gerard Butler, Sofia Vergara, Rodrigo y Gabriela (S18E17)
3/23/2010
Ed Helms, Pamela Anderson, Snoop Dogg (S18E18)
3/24/2010
Miley Cyrus, Tom Papa, Puddle of Mudd (S18E19)
3/25/2010
Craig T. Nelson, Rumer Willis, Ludacris (S18E20)
3/26/2010
Lauren Graham, Karl Rove, Joss Stone (S18E21)
3/29/2010
Joy Behar, Thomas Haden Church, Shooter Jennings (S18E22)
3/30/2010
Bill Maher, Wayne Vandenlangenberg, OneRepublic (S18E23)
3/31/2010
Zachary Levi, Bear Grylls, Justin Bieber (S18E24)
4/1/2010
Randy Jackson, Matthew & Amy Roloff, Monica (S18E25)
4/5/2010
Kirstie Alley, David Boreanaz, Slash & Andrew Stockdale (S18E26)
4/6/2010
David Duchovny, Kendra Wilkinson-Baskett, Corinne Bailey Rae (S18E27)
4/7/2010
Demi Moore, Rep. Barney Frank, Train (S18E28)
4/8/2010
Julie Scardina, Mary McCormack, Michael Kosta (S18E29)
4/9/2010
Russell Crowe, Jenna Elfman, Sade (S18E30)
4/12/2010
Nicolas Cage, Lisa Lampanelli, Lady Antebellum (S18E31)
4/13/2010
Tracy Morgan, Chloe Moretz, Alan Jackson (S18E32)
4/14/2010
Kate Gosselin, Kenny Chesney (S18E33)
4/15/2010
Hugh Jackman, Betty White, Collective Soul (S18E34)
4/16/2010
Brooke Shields, Phoenix (S18E35)
4/19/2010
Heidi Klum, Ken Jeong, Smashing Pumpkins (S18E36)
4/20/2010
Jennifer Lopez, Chace Crawford, Natalie Merchant (S18E37)
4/21/2010
Jeff Corwin, Pierce Brosnan, Maxwell (S18E38)
4/22/2010
Creed (S18E39)
4/23/2010
Joel McHale, "Real Housewives of New Jersey" Caroline Manzo, Jacqueline Laurita & Teresa Giudice, Melissa Etheridge (S18E40)
4/26/2010
Jessica Simpson, Jackie Earle Haley, Dierks Bentley (S18E41)
4/27/2010
Chelsea Handler, Aqualung (S18E42)
4/28/2010
Arnold Schwarzenegger, Sig Hansen, Laura Bell Bundy (S18E43)
4/29/2010
Mickey Rourke, Ashley Graham (S18E44)
4/30/2010
Julia Louis-Dreyfus, Jon Favreau, Godsmack (S18E45)
5/3/2010
Scarlett Johansson, Frank Caliendo, Michael Bolton (S18E46)
5/4/2010
Robert Downey Jr., Mindy Kaling (S18E47)
5/5/2010
Samuel L. Jackson, Kara DioGuardi, Jason Derulo (S18E48)
5/6/2010
Don Cheadle, Erin Andrews (S18E49)
5/7/2010
Laura Bush, Donald Trump, Limp Bizkit (S18E50)
5/10/2010
Amanda Seyfried, Guy Fieri, Luke Bryan (S18E51)
5/11/2010
Betty White, Jarod Miller, Macy Gray (S18E52)
5/12/2010
Garry Shandling, Ellie Kemper, Jakob Dylan (S18E53)
5/13/2010
Donald Trump, the Jonas Brothers, Neon Trees (S18E54)
5/14/2010
Bill Cosby, Ricky Gervais, Taio Cruz (S18E55)
5/17/2010
Michael Douglas, Charles Barkley, Joe Nichols (S18E56)
5/18/2010
Eddie Murphy, Carrie Ann Inaba, Bruno Tonioli, Damian Marley with Nas (S18E57)
5/19/2010
Chelsea Handler, Chris Matthews, Sarah McLachlan (S18E58)
5/20/2010
Kiefer Sutherland, Mary Lynn Rajskub, Adam Lambert (S18E59)
5/21/2010
Russell Brand, David Gregory, Bettye Lavette (S18E60)
5/24/2010
Bret Michaels, Jane Krakowski, John Butler Trio (S18E61)
5/25/2010
Kathy Griffin, Paula Deen, Hanson (S18E62)
5/26/2010
Katherine Heigl, Matthew Morrison, Allison Moorer (S18E63)
5/27/2010
Colin Farrell, Elisabeth Moss, Kevin Eubanks (S18E64)
5/28/2010
Mickey Rourke, Ashley Graham, Kevin Meaney (S18E65)
5/31/2010
Jennifer Lopez, Donald Glover, Natalie Merchant (S18E66)
6/1/2010
Jessica Simpson, Jackie Earle Haley, Dierks Bentley (S18E67)
6/2/2010
Ed Helms, Pamela Anderson, Snoop Dog (S18E68)
6/3/2010
Eddie Murphy, Mary Lynn Rajskub, Nas and Damian Marley (S18E69)
6/4/2010
Howie Mandel, Jillian Michaels, Hole (S18E70)
6/7/2010
Chris Rock, Nicole "Snooki" Polizzi, Sting (S18E71)
6/8/2010
Adam Sandler, Rachel Maddow, OK Go (S18E72)
6/9/2010
Denis Leary, Judd Apatow, Alanis Morissette (S18E73)
6/10/2010
Tim Allen, Against Me! (S18E74)
6/11/2010
Josh Brolin, Ashley Greene, Cee-Lo (S18E75)
6/14/2010
Robert Pattinson, Emma Roberts, Travie McCoy (S18E76)
6/15/2010
Lauren Graham, Rob Schneider, Matisyahu (S18E77)
6/16/2010
Jonah Hill, Quinton "Rampage" Jackson, Punch Brothers (S18E78)
6/17/2010
David Spade, Dan Riskin, Kelis (S18E79)
6/18/2010
Dakota Fanning, Daniel Tosh, Crystal Bowersox (S18E80)
6/21/2010
Queen Latifah, Mike "The Situation" Sorrentino, Robert Randolph (S18E81)
6/22/2010
Jeremy Piven, Louis C.K., Drake (S18E82)
6/23/2010
Tom Cruise, Bryce Dallas Howard, Sharon Jones & the Dap-Kings (S18E83)
6/24/2010
Cameron Diaz, Dan Riskin, Lee DeWyze (S18E84)
6/25/2010
Jason Segel, Jenni "JWoww" Farley, Enrique Iglesias (S18E85)
7/6/2010
Dave Salmoni, John C. Reilly, Big Boi (S18E86)
7/7/2010
Steve Carell, Jane Lynch, Michael Palascak (S18E87)
7/8/2010
Adrien Brody, Chris Isaak (S18E88)
7/9/2010
Seth Meyers, Jonathan Hillstrand & Josh Harris, Tracy Bonham (S18E89)
7/12/2010
Jennifer Love Hewitt, Jay Baruchel, Nikki & Rich (S18E90)
7/13/2010
Tracy Morgan, Drew Brees, Flo Rida (S18E91)
7/14/2010
Ellen Page, Austin "Chumlee" Russell & Corey Harrison, Grace Potter & the Nocturnals (S18E92)
7/15/2010
Craig Kilborn, Stephen Moyer, the Swell Season (S18E93)
7/16/2010
Don Rickles, Dwyane Wade, KISS (S18E94)
7/19/2010
Zac Efron, Lior Suchard, the Black Keys (S18E95)
7/20/2010
Chelsea Handler, Matt Bomer, Metric (S18E96)
7/21/2010
Jack Rebney & Ben Steinbauer (S18E97)
7/22/2010
Rachel Weisz, Tony Robbins, Gaslight Anthem (S18E98)
7/23/2010
Bill O'Reilly, Adam Shankman, Lyle Lovett (S18E99)
7/26/2010
Piers Morgan, Joey King, Jaron and the Long Road to Love (S18E100)
7/27/2010
Eva Mendes, Isiah Mustafa, Robert Cray (S18E101)
7/28/2010
Jennifer Aniston, Jason Schwartzman, Stone Temple Pilots (S18E102)
7/29/2010
Gabourey Sidibe, Jakub Vagner, Mike Vecchione (S18E103)
7/30/2010
Sylvester Stallone, Criss Angel, Maronzio Vance (S18E104)
8/2/2010
Betty White, Sam Trammell, Black Crowes (S18E105)
8/3/2010
Gordon Ramsay, Sofia Vergara, K'naan (S18E106)
8/4/2010
Mickey Rourke, Seth MacFarlane, Plain White T's (S18E107)
8/5/2010
Emma Thompson, comics from "Chelsea Lately", Taio Cruz (S18E108)
8/6/2010
Howie Mandel, Aubrey Plaza, Mike Posner (S18E109)
8/9/2010
Anna Kendrick, Eli Roth, Robert Francis (S18E110)
8/10/2010
Jason Statham, 92-year-old car lady Rachel Veitch, Los Lobos (S18E111)
8/11/2010
Javier Bardem, Paul Watson, Peter Bethune, the Whigs (S18E112)
8/12/2010
Justin Long, Alejandro Escovedo (S18E113)
8/13/2010
Jason Segel, Jenni J-Wow Farley, Enrique Iglesias (S18E114)
8/16/2010
Jennifer Aniston, Jason Schwartzman, Christina Perri (S18E115)
8/17/2010
Don Rickles, Dwyane Wade, KISS (S18E116)
8/18/2010
Gordon Ramsay, Sofia Vergara, K'Naan (S18E117)
8/19/2010
Wanda Sykes, Ben Steinbauer, Jack Rebney, 3OH!3 (S18E118)
8/20/2010
Don Johnson, Whitney Cummings, Cyndi Lauper & Jonny Lang (S18E119)
8/30/2010
Kim Kardashian, Rep. Barney Frank, Norah Jones (S18E120)
8/31/2010
Thomas Haden Church, Jules Sylvester, Goo Goo Dolls (S18E121)
9/1/2010
Al Michaels, Cris Collinsworth, Steve Buscemi, Herbie Hancock, Susan Tedeschi & Derek Trucks (S18E122)
9/2/2010
Louis C.K., Sara Bareilles (S18E123)
9/3/2010
Sylvester Stallone, Criss Angel, Maronzio Vance (S18E124)
9/6/2010
Carey Mulligan, Meghan McCain, Mavis Staples (S18E125)
9/7/2010
Chelsea Handler, Ken Jeong, Ray LaMontagne (S18E126)
9/8/2010
Katie Couric, Kurt Warner, David Gray (S18E127)
9/9/2010
Hugh Laurie, Emma Stone, Sarah McLachlan (S18E128)
9/10/2010
Bill Maher, Kristen Bell, Brandon Flowers (S18E129)
9/13/2010
Jamie Lee Curtis, Mike "The Situation" Sorrentino, Trace Adkins (S18E130)
9/14/2010
Ben Affleck, Julie Bowen, Weezer (S18E131)
9/15/2010
Kate Walsh, Jason Ritter, Santana & India.Arie (S18E132)
9/16/2010
Joel McHale, Arianna Huffington, Dov Davidoff (S18E133)
9/17/2010
Justin Timberlake, Jane Lynch, OK Go (S18E134)
9/20/2010
Ed Helms, Casey Affleck, Sheryl Crow (S18E135)
9/21/2010
Ryan Reynolds, Betty White, Tommy Lee (S18E136)
9/22/2010
Jimmy Smits, Jackie Evancho, Brian Wilson (S18E137)
9/23/2010
Dwyane Wade, Zachary Levi, Gloria Gaynor (S18E138)
9/24/2010
Lauren Graham, Vanilla Ice, Zac Brown Band (S18E139)
9/27/2010
Patrick Dempsey, Mindy Kaling, Train (S18E140)
9/28/2010
Diane Lane, Julie Scardina, Seal (S18E141)
9/29/2010
Morgan Freeman, Eric Stonestreet, Rodrigo y Gabriela (S18E142)
9/30/2010
Meredith Vieira, Seth MacFarlane, Kenny Chesney (S18E143)
10/1/2010
Will Arnett, Dot Marie Jones, a performance from Broadway's "Rock of Ages" (S18E144)
10/4/2010
Terrence Howard, Jillian Michaels, K.T. Tunstall (S18E145)
10/5/2010
Shaun White, Florence Henderson, Toby Keith (S18E146)
10/6/2010
Katherine Heigl, Ben Rappaport, Meat Loaf (S18E147)
10/7/2010
Terry Bradshaw, "Potato Lady" Doretta Cannon, OneRepublic (S18E148)
10/8/2010
Jay Mohr, Pauly D, Travie McCoy (S18E149)
10/11/2010
Heidi Klum, Ty Burrell, Johnny Mathis (S18E150)
10/12/2010
Harrison Ford, Whitney Cummings, Gogol Bordello (S18E151)
10/13/2010
Wanda Sykes, Rick Fox, Pete Yorn (S18E152)
10/14/2010
Eva Longoria Parker, Josh Duhamel, John Legend (S18E153)
10/15/2010
Matt Lauer, Martha Stewart, Lauren Pritchard (S18E154)
10/25/2010
Robert Downey Jr., Paula Deen, Jamey Johnson (S18E155)
10/26/2010
Robin Williams, Judd Apatow, Kylie Minogue (S18E156)
10/27/2010
Denzel Washington, Reed Timmer, Corinne Bailey Rae (S18E157)
10/28/2010
Rainn Wilson, Margaret Sparkman, Jimmy Eat World (S18E158)
10/29/2010
Janet Jackson, Jesse Tyler Ferguson, Duffy (S18E159)
11/1/2010
James Franco, Meghan McCain, Far East Movement (S18E160)
11/3/2010
Anne Hathaway, San Francisco Giant Brian Wilson, Aaron Neville (S18E161)
11/4/2010
Terry Bradshaw, Jennifer Grey, Jason Aldean (S18E162)
11/5/2010
Arnold Schwarzenegger, David Baker, N.E.R.D. (S18E163)
11/8/2010
Dave Salmoni, Chris Pine, Lee DeWyze (S18E164)
11/9/2010
David Spade, Christine O'Donnell, Old 97's (S18E165)
11/10/2010
Kim Kardashian, Dennis Miller, Soulja Boy (S18E166)
11/11/2010
Diane Keaton, Kevin McHale, Switchfoot (S18E167)
11/12/2010
Russell Crowe, Anna Torv, Annie Lennox (S18E168)
11/15/2010
Julianne Moore, Tom Felton, Nelly (S18E169)
11/16/2010
Christina Aguilera, Buddy Valastro (S18E170)
11/17/2010
George W. Bush, Jewel (S18E171)
11/18/2010
Garth Brooks, Mike "The Situation" Sorrentino (S18E172)
11/19/2010
Dane Cook, Taylor Swift, Keri Hilson (S18E173)
11/22/2010
Dwayne Johnson, Kevin Eubanks (S18E174)
11/23/2010
Cher, Jeremy Renner, Robyn (S18E175)
11/24/2010
Elizabeth Banks, Marjorie Johnson, Carrot Top (S18E176)
11/25/2010
Bill Cosby, Atticus Shaffer, Keyshia Cole (S18E177)
11/29/2010
Chelsea Handler, Kellan Lutz, Rod Stewart (S18E178)
11/30/2010
Mitt Romney, Jay Mohr, Darius Rucker (S18E179)
12/1/2010
Jane Fonda, Ian Somerhalder, Paul Reiser & Julia Fordham (S18E180)
12/2/2010
Louis C.K., Aron Ralston, Josh Turner (S18E181)
12/3/2010
Russell Brand, Chris Colfer, Jonny Lang with Chris Layton, Brad Whitford & Billy Cox (S18E182)
12/6/2010
Helen Mirren, Aaron Eckhart, Keith Urban (S18E183)
12/7/2010
Jeff Bridges, Rico Rodriguez (S18E184)
12/8/2010
Halle Berry, Billy Gardell, Natasha Bedingfield (S18E185)
12/9/2010
Matthew Morrison, Crystal Bowersox (S18E186)
12/10/2010
Mark Wahlberg, Olivia Wilde, Good Charlotte (S18E187)
12/13/2010
Jack Black, Michael Buble (S18E188)
12/14/2010
Emily Blunt, Keith Fitzhugh, Jackie Evancho (S18E189)
12/15/2010
Jason Segel, Adam Ferrara, Tanner Foust & Rutledge Wood, Katharine McPhee (S18E190)
12/16/2010
Owen Wilson, Elle Fanning, Lyle Lovett with Kat Edonson (S18E191)
12/17/2010
Larry King, Garrett Hedlund, Pink Martini (S18E192)
12/20/2010
Emma Stone, Marjorie Johnson, Sharon Jones & the Dap-Kings (S18E193)
12/21/2010
Javier Bardem, Jarod Miller, Naturally 7 with the Agape International Choir (S18E194)
12/22/2010
Zachary Levi, Whitney Cummings, BeBe & CeCe Winans with Mary Mary and the West Angeles Choir (S18E195)
12/23/2010
Mark Wahlberg, Lachlan Patterson, James Blunt (S18E221)
2/7/2011
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