19x12 - Ashton Kutcher, Aubrey Plaza, Neon Trees

January 18, 2011

Ashton Kutcher, Aubrey Plaza, Neon Trees

19x13 - Amy Poehler, Mike "The Situation" Sorrentino, Grace Potter & the Nocturnals

January 19, 2011

Amy Poehler, Mike 'The Situation' Sorrentino, Grace Potter & the Nocturnals

19x14 - Ben Affleck, the Decemberists

January 20, 2011

Ben Affleck, the Decemberists

19x15 - Kathie Lee Gifford & Hoda Kotb, Armie Hammer, Hayes Carll

January 21, 2011

Kathie Lee Gifford & Hoda Kotb, Armie Hammer, Hayes Carll

19x16 - Dana Carvey, Maggie Q, Lizz Wright

January 24, 2011

Dana Carvey, Maggie Q, Lizz Wright

19x17 - Jason Statham, Melissa McCarthy, White Lies

January 25, 2011

Jason Statham, Melissa McCarthy, White Lies

19x18 - Annette Bening, Frank Caliendo, Amos Lee

January 26, 2011

Annette Bening, Frank Caliendo, Amos Lee

19x19 - Kathy Bates, Brad Womack, Billy Currington

January 27, 2011

Kathy Bates, Brad Womack, Billy Currington

19x20 - Justin Bieber, Jay Mohr, the Band Perry

January 28, 2011

Justin Bieber, Jay Mohr, the Band Perry

19x21 - Adam Sandler, Larry the Cable Guy, Esperanza Spalding

January 31, 2011

Adam Sandler, Larry the Cable Guy, Esperanza Spalding

19x22 - Helena Bonham Carter, Timothy Olyphant, One eskimO

February 1, 2011

Helena Bonham Carter, Timothy Olyphant, One eskimO

19x23 - Jesse Eisenberg, Jennifer Lawrence, Ryan Bingham

February 2, 2011

Jesse Eisenberg, Jennifer Lawrence, Ryan Bingham

19x24 - Jeff Bridges, Dianna Agron, Bobby Long

February 3, 2011

Jeff Bridges, Dianna Agron, Bobby Long

19x25 - Hugh Laurie, Hailee Steinfeld, Finesse Mitchell

February 4, 2011

Hugh Laurie, Hailee Steinfeld, Finesse Mitchell

19x26 - Mark Wahlberg, Lachlan Patterson, James Blunt

February 7, 2011

Mark Wahlberg, Lachlan Patterson, James Blunt

19x27 - Javier Bardem, Paula Abdul, Merle Haggard

February 8, 2011

Mark Wahlberg, Lachlan Patterson, James Blunt

19x28 - Matt LeBlanc, Clay Matthews, Ricky Martin

February 9, 2011

Matt LeBlanc, Clay Matthews, Ricky Martin

19x29 - Rob Lowe, Amber Riley, Nicki Minaj

February 10, 2011

Rob Lowe, Amber Riley, Nicki Minaj

19x30 - Kathy Griffin, Gayle King, the Black Keys

February 11, 2011

Kathy Griffin, Gayle King, the Black Keys

19x31 - Lady Gaga, Sofia Vergara, John Legend

February 14, 2011

Lady Gaga, Sofia Vergara, John Legend

19x32 - Liam Neeson, Dave Salmoni, Gretchen Wilson

February 15, 2011

Liam Neeson, Dave Salmoni, Gretchen Wilson

19x33 - Charles Barkley, Jenni "JWoww" Farley, Red

February 16, 2011

Charles Barkley, Jenni 'JWoww' Farley, Red

19x34 - Jenna Fischer, Abigail Breslin, Miguel

February 17, 2011

Jenna Fischer, Abigail Breslin, Miguel

19x35 - Mark Harmon, Dwight Howard, 30 Seconds to Mars

February 18, 2011

Mark Harmon, Dwight Howard, 30 Seconds to Mars

19x36 - The Tonight Show with Jay Leno Season 19 Episode 36

February 21, 2011

19x37 - Owen Wilson, Rachel Maddow, Anberlin

February 22, 2011

Owen Wilson, Rachel Maddow, Anberlin

19x38 - Randy Jackson, Nick Swardson, Travie McCoy

February 23, 2011

Randy Jackson, Nick Swardson, Travie McCoy

19x39 - Meredith Vieira, DJ Pauly D, Hanson

February 24, 2011

Meredith Vieira, DJ Pauly D, Hanson

19x40 - Emily Blunt, Jackson Murphy, Chris Medina

February 25, 2011

Emily Blunt, Jackson Murphy, Chris Medina

19x41 - Christina Appelgate, John Fulton, Michael Franti

February 28, 2011

Christina Appelgate, John Fulton, Michael Franti

19x42 - Matt Damon, Betty White, Cake

March 1, 2011

Matt Damon, Betty White, Cake

19x43 - Simon Cowell, Jeff Gordon, Travis Barker

March 2, 2011

Simon Cowell, Jeff Gordon, Travis Barker

19x44 - Jerry Seinfeld, Bailee Madison, Darlene Love

March 3, 2011

Jerry Seinfeld, Bailee Madison, Darlene Love

19x45 - Aaron Eckhart, Christie Brinkley, Thompson Square

March 4, 2011

Aaron Eckhart, Christie Brinkley, Thompson Square

19x46 - Jane Lynch, Chris Matthews, Avril Lavigne

March 14, 2011

Jane Lynch, Chris Matthews, Avril Lavigne

19x47 - Wanda Sykes, Simon Pegg, Juanes

March 15, 2011

Wanda Sykes, Simon Pegg, Juanes

19x48 - Matthew McConaughey, Rizwan Manji, Michael Kosta

March 16, 2011

Matthew McConaughey, Rizwan Manji

19x49 - Rainn Wilson, "Epic Meal Time" with Harley Morenstein & Sterling Toth, Serj Tankian

March 17, 2011

Rainn Wilson, Epic Meals with Harley Morenstein & Sterling Toth, Serj Tankian

19x50 - Robert Pattinson, Whitney Cummings, Alice Cooper

March 18, 2011

Robert Pattinson, Whitney Cummings, Alice Cooper

19x51 - Zachary Levi, Lisa Lampanelli, Raphael Saadiq

March 21, 2011

Zachary Levi, Lisa Lampanelli, Raphael Saadiq

19x52 - Julie Scardina, Rebecca Black, Duran Duran

March 22, 2011

Julie Scardina, Rebecca Black, Duran Duran

19x53 - Carol Burnett, Jason Ritter, Keith Urban

March 23, 2011

Carol Burnett, Jason Ritter, Keith Urban

19x54 - Kirstie Alley, Jon "Bones" Jones, Peter, Bjorn & John

March 24, 2011

Kirstie Alley, Jon "Bones" Jones, Peter, Bjorn & John

19x55 - Jennifer Hudson, William H. Macy

March 25, 2011

Jennifer Hudson, William H. Macy

19x56 - Russell Brand, Lorraine Nicholson, Los Lonely Boys

March 28, 2011

Russell Brand, Lorraine Nicholson, Los Lonely Boys

19x57 - Howie Mandel, Zachary Gordon, Dierks Bentley

March 29, 2011

Howie Mandel, Zachary Gordon, Dierks Bentley

19x58 - Helen Hunt, Sammy Hagar, Good Charlotte

March 30, 2011

Helen Hunt, Sammy Hagar, Good Charlotte

19x59 - Kourtney & Kim Kardashian, Fareed Zakaria, Mary Mary

March 31, 2011

Kourtney & Kim Kardashian, Fareed Zakaria, Mary Mary

19x60 - Vin Diesel, Ashley Tisdale, Scissor Sisters

April 1, 2011

Vin Diesel, Zachary Gordon, Scissor Sisters

19x61 - Tracy Morgan, Neve Campbell, Augustana

April 4, 2011

Tracy Morgan, Neve Campbell, Augustana

19x63 - Matthew Morrison, Carrie Underwood

April 6, 2011

Matthew Morrison, Carrie Underwood

19x64 - Emma Roberts, Gary Busey, Jeff Beck with Imelda May

April 7, 2011

Emma Roberts, Gary Busey, Jeff Beck with Imelda May

19x65 - David Arquette, Ben Bailey, Far East Movement

April 8, 2011

David Arquette, Ben Bailey, Far East Movement

19x66 - Jamie Foxx, k.d. lang

April 11, 2011

Jamie Foxx, k.d. lang

19x67 - Kristen Bell, Austin "Chumlee" Russell

April 12, 2011

Kristen Bell, Austin "Chumlee" Russell

19x68 - Jessie J

April 13, 2011

Diane Lane, Chris Jericho, Jessie J

19x69 - Tyler Perry, Kendra Wilkinson, Bright Eyes

April 14, 2011

19x70 - John Travolta, Eliza Doolittle

April 15, 2011

19x71 - Christina Aguilera, Paul Reiser, Alison Krauss & Union Station featuring Jerry Douglas

April 25, 2011

19x72 - Lindsay Lohan, Jillian Michaels, the Airborne Toxic Event

April 26, 2011

19x73 - Rene Russo, Kevin Hart, Buddy Guy

April 27, 2011

19x74 - Chelsea Handler, Judd Apatow, OK Go

April 28, 2011

19x75 - Rob Lowe, Moby

April 29, 2011

19x76 - Paul Walker, Donny & Marie Osmond

May 2, 2011

19x77 - Penelope Cruz, Ricky Martin

May 3, 2011

19x78 - Kate Hudson, Chris Hemsworth, Sergio Mendes with Siedah Garrett

May 4, 2011

19x79 - Wanda Sykes, Ralph Macchio, Priscilla Ahn

May 5, 2011

19x80 - Steven Tyler, Aubrey Plaza, the Civil Wars

May 6, 2011

19x81 - Jennifer Lopez, Chris Colfer, BC Jean

May 9, 2011

Jennifer Lopez, Chris Colfer, BC Jean

19x82 - Julie Scardina, Ginnifer Goodwin, Def Leppard

May 10, 2011

Julie Scardina, Ginnifer Goodwin, Def Leppard

19x83 - Dick Van Dyke, Khloe Kardashian & Lamar Odom, Steve Earle

May 11, 2011

Dick Van Dyke, Khloe Kardashian & Lamar Odom, Steve Earle

19x84 - Norm Macdonald

May 12, 2011

Norm Macdonald

19x85 - Jodie Foster, Ken Jeong, Rodrigo y Gabriela

May 13, 2011

Jodie Foster, Ken Jeong, Rodrigo y Gabriela

19x86 - Eva Mendes, storm chaser Reed Timmer, Tedeschi Trucks Band

May 16, 2011

19x87 - Ryan Seacrest, Jordana Brewster, TV on the Radio

May 17, 2011

19x88 - Ed Helms, Chelsea Kane, Iron & Wine

May 18, 2011

19x89 - Jack Black, Mike Huckabee, Parachute

May 19, 2011

19x90 - Kirstie Alley, Erik Rivera, Il Volo

May 20, 2011

19x91 - Dustin Hoffman, Meghan McCain, the Script

May 23, 2011

19x92 - Meredith Vieira, Demetri Martin, Ben Harper

May 24, 2011

19x93 - Chaz Bono, Brady Barr, Foster the People

May 25, 2011

19x94 - Piers Morgan, Rico Rodriguez, Scott Weiland

May 26, 2011

19x95 - Paris Hilton, Dhani Jones, INXS with Pat Monahan

May 27, 2011

19x96 - Katie Couric, Cee-Lo Green

June 6, 2011

19x97 - Kevin Bacon, Bethenny Frankel, OneRepublic

June 7, 2011

19x98 - Jada Pinkett Smith, Elle Fanning, Lenka

June 8, 2011

19x99 - Jim Carrey, Selena Gomez, Tinie Tempah

June 9, 2011

19x100 - Bill Cosby, Kris & Bruce Jenner, Neon Trees

June 10, 2011

19x101 - Adam Levine, Ziggy Marley

June 13, 2011

19x102 - Kim Kardashian, Lior Suchard, Randy Travis with Josh Turner

June 14, 2011

19x103 - Blake Lively, Blake Shelton, Scotty McCreery

June 15, 2011

19x104 - Larry David, Pitbull with Ne-Yo

June 16, 2011

19x105 - Josh Duhamel, Jill Scott

June 17, 2011

19x106 - Bono & the Edge, Larry the Cable Guy, a performance from

June 20, 2011

19x107 - Rosario Dawson, Marc Anthony, Jackie Evancho

June 21, 2011

19x108 - Louis C.K., Richard Engel, Raphael Saadiq

June 22, 2011

19x109 - Justin Timberlake, Kevin Hart, the Antlers

June 23, 2011

19x110 - David Spade, Tom Papa, Plain White T's

June 24, 2011

19x111 - Jim Carrey, Selena Gomez, Tinie Tempah

June 27, 2011

19x112 - Blake Lively, Blake Shelton, Scotty McCreery

June 28, 2011