18x1 - Brian Williams, Paula Abdul

January 3, 2011

18x2 - Tim McGraw, Shaquille O'Neal, Keri Hilson

January 4, 2011

18x3 - Jennifer Connelly, Dr. Oz, Justin Townes Earle

January 5, 2011

18x4 - Seth Rogen, Beau Garrett, the Walkmen

January 6, 2011

18x5 - Regis Philbin, Hannibal Buress, No Age

January 7, 2011

18x6 - Bill Cosby, a Top Ten List presented by Nicole "Snooki" Polizzi, the Black Keys

January 10, 2011

18x7 - Vince Vaughn, Mike Wolfe & Frank Fritz, Cage the Elephant

January 11, 2011

18x8 - Kevin James, Olivia Munn, The Low Anthem

January 12, 2011

18x9 - Kelsey Grammer, Amar'e Stoudemire, Gregg Allman

January 13, 2011

18x10 - Joan Rivers, Jeff Caldwell, Wintersleep

January 14, 2011

18x11 - Jack Hanna, Steven Tyler

January 17, 2011

18x12 - Betty White, Kim & Kourtney Kardashian, the Script

January 18, 2011

18x13 - Martin Short, Greta Gerwig, Darius Rucker

January 19, 2011

18x14 - Kaley Cuoco, Piers Morgan, Wanda Jackson, Miss Arkansas, Alyse Eady

January 20, 2011

18x15 - Nathan Lane, Mike Palascak, Esperanza Spalding

January 21, 2011

18x16 - Justin Bieber, Pauley Perrette, Best Coast

January 31, 2011

18x17 - Matthew Perry, Chris Elliott, Top Ten with Mitt Romney, the National

February 1, 2011

18x18 - Kate Walsh, Jim Gaffigan, Boxer Rebellion

February 2, 2011

18x19 - Howard Stern, Naughty By Nature

February 3, 2011

18x20 - Martha Stewart, Top Ten with Justin Bieber, Robert Plant

February 4, 2011

18x21 - Super Bowl MVP Aaron Rodgers, Martin Lawrence, Steel Magnolia

February 7, 2011

18x22 - Adam Sandler, Chris Colfer, Gang of Four

February 8, 2011

18x23 - Anderson Cooper, Elton John

February 9, 2011

18x24 - Nicole "Snooki" Polizzi, Judah Friedlander, Bryan Ferry

February 10, 2011

18x26 - S.I. Swimsuit Cover Reveal & Top 10, Tom Brokaw, Theophilus London

February 14, 2011

Tom Brokaw, a Top Ten List presented by 10 "Sports Illustrated" swimsuit models, Theophilus London

18x27 - Forest Whitaker, S.I. Swimsuit Cover Model Irina, Josh Groban, Top Ten with Joy Philbin

February 15, 2011

18x28 - Bill Hader, Grocery Bagging Champ Krystal, Amos Lee

February 16, 2011

18x29 - Paris Hilton, Nathan Fillion, Scissor Sisters

February 17, 2011

18x30 - David Spade, Andy Kindler, Lukas Nelson and Promise of the Real

February 18, 2011

18x31 - Donald Rumsfeld, Cobie Smulders

February 21, 2011

18x32 - Amy Poehler, Jean Chu and Dusty the Cat, Deerhunter

February 22, 2011

18x33 - Rainn Wilson, Hank Aaron

February 23, 2011

18x34 - Senator Rand Paul, Bright Eyes

February 24, 2011

18x35 - Matthew Morrison, Jeff Altman, Jessica Lea Mayfield

February 25, 2011

18x36 - Brian Williams, Trey Parker & Matt Stone, Zac Brown Band

February 28, 2011

18x37 - Amanda Seyfried, B.J. Novak

March 1, 2011

18x38 - Donald Trump, Vanessa Hudgens, Oh Land

March 2, 2011

18x39 - Robin Williams, Judy Greer

March 3, 2011

18x40 - Charles Barkley, Sarah Vowell, Cold War Kids

March 14, 2011

18x41 - Bradley Cooper, Mindy Kaling, Bob Geldof

March 15, 2011

18x42 - Steve Martin, Selena Gomez

March 16, 2011

18x43 - Dana Carvey, Dr. Michio Kaku, British Sea Power

March 21, 2011

18x44 - Katie Couric, The Pains of Being Pure at Heart

March 22, 2011

18x45 - Ben Stiller, Dario Franchitti, The Strokes

March 23, 2011

18x46 - "Jungle" Jack Hanna, Danny McBride

March 28, 2011

18x47 - Regis Philbin, Snoop Dogg

March 29, 2011

18x48 - Norm Macdonald, CC Sabathia, Willie Nelson, Norah Jones and Wynton Marsalis

March 30, 2011

18x49 - Chris Rock, Ellen Page, Funeral Party

March 31, 2011

18x50 - James Franco, Royal Bangs

April 1, 2011

18x51 - Jennifer Garner, Jamie Oliver, Robbie Robertson

April 5, 2011

18x52 - Don Rickles, Eva Longoria

April 6, 2011

18x53 - Alec Baldwin, Wiz Khalifa

April 11, 2011

18x54 - Ricky Gervais, Top Ten with Katie Holmes, Foo Fighters

April 12, 2011

18x55 - Courteney Cox, Aziz Ansari, Alison Krauss & Union Station featuring Jerry Douglas

April 13, 2011

18x56 - Seth Meyers, Carmelo Anthony, TV on the Radio

April 14, 2011

18x57 - Tina Fey, Tommy Johnagin, The Gaslight Anthem

April 15, 2011

18x58 - Bill Maher, Cote de Pablo, Lupe Fiasco

April 25, 2011

18x59 - Will Ferrell, The Twilight Singers

April 26, 2011

18x60 - Kate Hudson, Rich Eisen, Emmylou Harris

April 27, 2011

18x61 - Dr. Phil McGraw, Chris Hemsworth, Broadway musical "Catch Me If You Can"

April 28, 2011

18x62 - John Krasinski, Brian Kiley, Steve Earle

April 29, 2011

18x63 - Brian Williams, Rex Ryan

May 2, 2011

18x64 - Caroline Kennedy, Ty Burrell

May 3, 2011

18x65 - Betty White, Rick Harrison, Morning Teleportation

May 4, 2011

Dave welcomes actress Betty White, reality-TV star Rick Harrison and Morning Teleportation performs.

18x66 - Jodie Foster, Tom Dreesen, Neon Trees

May 5, 2011

Jodie Foster, Tom Dreesen, Neon Trees

18x67 - Bill Murray, ''The Human Fuse'' Brian Miser, Brother

May 6, 2011

Bill Murray, "The Human Fuse" Brian Miser, Brother

18x68 - Albert Brooks, Kristen Wiig

May 9, 2011

18x69 - Mark Harmon, Chris Morgan, Hugo

May 10, 2011

18x71 - Stupid human tricks, Jim Parsons, Manchester Orchestra

May 12, 2011

18x72 - Joan Rivers, Nick Griffin, Okkervil River

May 13, 2011

Dave welcomes comedian Joan Rivers, comic Nick Griffin and Okkervil River performs.

18x73 - Julianna Margulies, Andy Cohen, a Top Ten List presented by Christina Aguilera, White Lies

May 16, 2011

Dave welcomes actress Julianna Margulies from CBS's "The Good Wife," talk show host Andy Cohen, a Top Ten List presented by singer Christina Aguilera and White Lies perform.

18x74 - Martin Short, Melissa McCarthy, Tinie Tempah

May 17, 2011

Dave welcomes actor Martin Short, actress Melissa McCarthy from CBS's "Mike & Molly" and Tinie Tempah performs.

18x75 - Keith Olbermann, Julie Bowen, Ben Harper

May 18, 2011

Dave welcomes TV host Keith Olbermann, actress Julie Bowen and Ben Harper performs.