9x1 - Patricia Heaton, Brad Womack, Josh Groban

January 3, 2011

9x2 - Matt LeBlanc, Julie Benz, Michael Carbonaro

January 4, 2011

9x3 - Simon Baker, Nicole 'Snooki' Polizzi, Lloyd Banks

January 5, 2011

9x4 - Amy Adams, Chris Colfer, Young the Giant

January 6, 2011

9x5 - Cameron Diaz, Scott Foley, Far East Movement

January 10, 2011

9x6 - Channing Tatum, Mamie Gummer, A Day To Remember

January 11, 2011

9x7 - Sandra Oh, Rico Rodriguez, Nolan Gould, Ariel Winter, Fitz & the Tantrums

January 12, 2011

9x8 - Seth Rogen, Elle Fanning, the Damned Things

January 13, 2011

Guest director Michel Gondry.

9x9 - Randy Jackson, Jennifer Lawrence, Andrew Norelli

January 18, 2011

9x10 - Don Rickles, Wilmer Valderrama, New Politics

January 19, 2011

9x11 - Ryan Gosling, Kourtney Kardashian, Ra Ra Riot

January 20, 2011

9x12 - James McAvoy, Jim Sturgess, K.T. Tunstall

January 21, 2011

9x13 - Cory Monteith, Joan Rivers, the Script

January 24, 2011

9x14 - Anthony Hopkins, Hailee Steinfeld, Delta Spirit

January 25, 2011

9x15 - Amy Poehler, Martha Plimpton, Cold War Kids

January 26, 2011

9x16 - Ryan Seacrest, Melissa Leo, Cage the Elephant

January 27, 2011

9x17 - Julianna Margulies, Matthew Bomer, the JaneDear Girls

January 31, 2011

9x18 - Jamie Foxx, Sarah Shahi

February 1, 2011

9x19 - Josh Brolin, Camille Grammer, Tinie Tempah

February 2, 2011

9x20 - Kim Kardashian, Alex Trebek, One eskimO

February 3, 2011

9x21 - Dr. Phil McGraw, Amy Sedaris, Nelly

February 7, 2011

9x22 - Matthew Perry, Morena Baccarin, Pitbull

February 8, 2011

9x23 - Adam Sandler, Bobby Flay, Ke

February 9, 2011

9x24 - Justin Bieber, Travis Barker featuring Game and Swizz Beats

February 10, 2011

9x25 - Martin Lawrence, Dianna Agron, Jewel

February 14, 2011

9x26 - Jeremy Renner, Eric Stonestreet, Black Dub

February 15, 2011

9x27 - Javier Bardem, Flavor Flav, Stone Sour

February 16, 2011

9x28 - Jason Sudeikis, Blake Griffin, Keri Hilson

February 17, 2011

9x29 - Cameron Diaz, Henry Winkler, Cake

February 22, 2011

9x30 - Nancy Grace, Twilight Singers

February 23, 2011

9x31 - Owen Wilson, Kelly Ripa, Adele

February 24, 2011

9x32 - Tom Hanks, Cee Lo Green

February 27, 2011

9x33 - Bill Maher, Esperanza Spalding

February 28, 2011

9x35 - Amanda Seyfried, Nick Offerman, Henry Wolfe

March 2, 2011

9x36 - Howard Stern, Michael Franti

March 3, 2011

9x37 - Ryan Phillippe, Mila Kunis, the new 'Bachelorette', Ron Sexsmith

March 14, 2011

9x38 - Jane Lynch, David Boreanaz, Avril Lavigne

March 15, 2011

9x39 - Kristen Wiig, Adam Scott, the Wombats

March 16, 2011

9x40 - Matthew McConaughey, Jena Malone, Young Dubliners

March 17, 2011

9x41 - Liv Tyler, Mark Cuban, Brett Dennen

March 21, 2011

9x42 - Rainn Wilson, Abbie Cornish, the Gaslight Anthem

March 22, 2011

9x43 - Jake Gyllenhaal, Jerry Weintraub, Quinn Sullivan

March 23, 2011

9x44 - Penelope Cruz, Paul Iacono, Oh Land

March 24, 2011

9x45 - Sharon Osbourne, Bruno Tonioli, the Sounds

March 28, 2011

9x46 - Johnny Knoxville, the latest 'Dancing With the Stars' castoff, Britney Spears

March 29, 2011

9x47 - Danny McBride, Sara Ramirez, Duran Duran

March 30, 2011

9x48 - David Beckham, Wes Craven, Sum 41

March 31, 2011

9x49 - Katie Holmes, Dana Delany, Bad Religion

April 4, 2011

9x50 - Christian Slater, Dr. Drew Pinsky, the latest 'Dancing with the Stars' castoff, the Decemberists

April 5, 2011

9x51 - Norm MacDonald, Elisha Cuthbert, Funeral Party

April 6, 2011

9x52 - Vin Diesel, Neve Campbell, Ellie Goulding

April 7, 2011

9x53 - David Arquette, Mike Birbiglia, Asking Alexandria

April 11, 2011

9x54 - Emma Roberts, Morgan Spurlock, the latest 'Dancing with the Stars' castoff, Jenny and Johnny

April 12, 2011

9x55 - Eva Longoria, Patrick Warburton, Robyn

April 13, 2011

9x56 - Tom Arnold, Alison Brie, Francis & the Lights

April 14, 2011

9x57 - Courtney Cox, Gary Busey, Jessie J

April 18, 2011

9x58 - Dwayne Johnson, the latest 'Dancing with the Stars' castoff, Sammy Hagar, the Belle Brigade

April 19, 2011

9x59 - Robert Pattinson, Shailene Woodley, Lenka

April 20, 2011

9x60 - Christoph Waltz, Kunal Nayyar, Phantogram

April 21, 2011

9x61 - Martin Short, Kat Dennings, Alter Bridge

April 25, 2011

9x62 - Mark Ruffalo, Jamie Oliver, the latest 'Dancing with the Stars' castoff, Robbie Robertson

April 26, 2011

9x63 - Larry King, Jaimie Alexander, Augustana

April 27, 2011

9x64 - Diane Sawyer, Sofia Vergara, Manny Pacquiao, the Airborne Toxic Event

April 28, 2011

9x65 - Rene Russo, Kristin Gore, k.d. lang

May 2, 2011

9x66 - Anthony Hopkins, Andre Agassi, “Dancing with the Stars” castoff Kendra Wilkinson-Baskett

May 3, 2011

9x67 - Kenneth Branagh, Ellie Kemper, the 2011 National School Scrabble Champions

May 4, 2011

9x68 - Chris Hemsworth, Calexico

May 5, 2011

9x69 - Rob Lowe, Ty Pennington, Wiz Khalifa

May 9, 2011

9x70 - Nathan Fillion, the latest 'Dancing with the Stars' castoff, Calle 13

May 10, 2011

9x71 - Chris O'Donnell, Ginnifer Goodwin, Zac Brown Band

May 11, 2011

9x72 - Kate Hudson, Windell Middlebrooks, Raphael Saadiq

May 12, 2011

9x73 - Topher Grace, Adam Carolla, Christina Perri

May 18, 2011

9x74 - Albert Brooks, Chaz Bono, Rammstein

May 19, 2011

9x75 - Khloe Kardashian Odom, 'Science Bob' Pflugfelder, Scott Weiland

May 20, 2011

9x76 - Wanda Sykes, 'Bachelorette' Ashley Hebert, Foster the People

May 23, 2011

9x77 - “Dancing with the Stars” winners Hines Ward & Kym Johnson, Taylor Lautner, Britney Spears

May 24, 2011

9x78 - Jesse Tyler Ferguson, Sarah Vowell, Maybach Music Group featuring Rick Ross

May 25, 2011

9x79 - Christina Aguilera, Mike Tyson, Big Sean

May 26, 2011

9x80 - Carson Daly, Flavor Flav, I See Stars

May 31, 2011

9x81 - Jason Sudeikis, Piers Morgan, Lykke Li

June 2, 2011

9x82 - Paris Hilton, “Bachelorette” Ashley Hebert, spelling bee champion Sukanya Roy, Sara Bareilles

June 7, 2011

9x83 - Kathy Griffin, J.J. Abrams, Friendly Fires

June 9, 2011

9x84 - Elle Fanning, John Henson, Gruff Rhys

June 13, 2011