Brian Williams, Paula Abdul
Tim McGraw, Shaquille O'Neal, Keri Hilson
Jennifer Connelly, Dr. Oz, Justin Townes Earle
Seth Rogen, Beau Garrett, the Walkmen
Regis Philbin, Hannibal Buress, No Age
Bill Cosby, a Top Ten List presented by Nicole "Snooki" Polizzi, the Black Keys
Vince Vaughn, Mike Wolfe & Frank Fritz, Cage the Elephant
Kevin James, Olivia Munn, The Low Anthem
Kelsey Grammer, Amar'e Stoudemire, Gregg Allman
Joan Rivers, Jeff Caldwell, Wintersleep
Jack Hanna, Steven Tyler
Betty White, Kim & Kourtney Kardashian, the Script
Martin Short, Greta Gerwig, Darius Rucker
Kaley Cuoco, Piers Morgan, Wanda Jackson, Miss Arkansas, Alyse Eady
Nathan Lane, Mike Palascak, Esperanza Spalding
Justin Bieber, Pauley Perrette, Best Coast
Matthew Perry, Chris Elliott, Top Ten with Mitt Romney, the National
Kate Walsh, Jim Gaffigan, Boxer Rebellion
Howard Stern, Naughty By Nature
Martha Stewart, Top Ten with Justin Bieber, Robert Plant
Super Bowl MVP Aaron Rodgers, Martin Lawrence, Steel Magnolia
Adam Sandler, Chris Colfer, Gang of Four
Anderson Cooper, Elton John
Nicole "Snooki" Polizzi, Judah Friedlander, Bryan Ferry
Ed Helms, Ted Alexandro, Steel Magnolia
S.I. Swimsuit Cover Reveal & Top 10, Tom Brokaw, Theophilus London
Forest Whitaker, S.I. Swimsuit Cover Model Irina, Josh Groban, Top Ten with Joy Philbin
Bill Hader, Grocery Bagging Champ Krystal, Amos Lee
Paris Hilton, Nathan Fillion, Scissor Sisters
David Spade, Andy Kindler, Lukas Nelson and Promise of the Real
Donald Rumsfeld, Cobie Smulders
Amy Poehler, Jean Chu and Dusty the Cat, Deerhunter
Rainn Wilson, Hank Aaron
Senator Rand Paul, Bright Eyes
Matthew Morrison, Jeff Altman, Jessica Lea Mayfield
Brian Williams, Trey Parker & Matt Stone, Zac Brown Band
Amanda Seyfried, B.J. Novak
Donald Trump, Vanessa Hudgens, Oh Land
Robin Williams, Judy Greer
Charles Barkley, Sarah Vowell, Cold War Kids
Bradley Cooper, Mindy Kaling, Bob Geldof
Steve Martin, Selena Gomez
Dana Carvey, Dr. Michio Kaku, British Sea Power
Katie Couric, The Pains of Being Pure at Heart
Ben Stiller, Dario Franchitti, The Strokes
"Jungle" Jack Hanna, Danny McBride
Regis Philbin, Snoop Dogg
Norm Macdonald, CC Sabathia, Willie Nelson, Norah Jones and Wynton Marsalis
Chris Rock, Ellen Page, Funeral Party
James Franco, Royal Bangs
Jennifer Garner, Jamie Oliver, Robbie Robertson
Don Rickles, Eva Longoria
Alec Baldwin, Wiz Khalifa
Ricky Gervais, Top Ten with Katie Holmes, Foo Fighters
Courteney Cox, Aziz Ansari, Alison Krauss & Union Station featuring Jerry Douglas
Seth Meyers, Carmelo Anthony, TV on the Radio
Tina Fey, Tommy Johnagin, The Gaslight Anthem
Bill Maher, Cote de Pablo, Lupe Fiasco
Will Ferrell, The Twilight Singers
Kate Hudson, Rich Eisen, Emmylou Harris
Dr. Phil McGraw, Chris Hemsworth, Broadway musical "Catch Me If You Can"
John Krasinski, Brian Kiley, Steve Earle
Brian Williams, Rex Ryan
Caroline Kennedy, Ty Burrell
Betty White, Rick Harrison, Morning Teleportation
Jodie Foster, Tom Dreesen, Neon Trees
Bill Murray, ''The Human Fuse'' Brian Miser, Brother
Albert Brooks, Kristen Wiig
Mark Harmon, Chris Morgan, Hugo
Stupid human tricks, Jim Parsons, Manchester Orchestra
Joan Rivers, Nick Griffin, Okkervil River
Julianna Margulies, Andy Cohen, a Top Ten List presented by Christina Aguilera, White Lies
Martin Short, Melissa McCarthy, Tinie Tempah
Keith Olbermann, Julie Bowen, Ben Harper
Kelly Ripa, Jennifer Lawrence, How to Succeed in Business Without Really Trying
Tracy Morgan, Jake Johannsen, The Airborne Toxic Event
Lady Gaga, Eric Stonestreet, The Vaccines
Ewan McGregor, Scott Pelley, Brad Paisley
Piedmont Bird Callers, Kevin Bacon, Augustana
Ray Romano, Reese Waters, Arctic Monkeys
Meredith Vieira, Indianapolis 500 winner Dan Wheldon, Drum Solo Week kicks off with Anton Fig
Kyle Chandler, Kathy Griffin, Sheila E.
Jon Cryer, Rachel Maddow, Roy Haynes
Neil Patrick Harris, Mike Birbiglia, Neil Peart
Adm. Michael Mullen, Top Ten by Betty White, Black Joe Lewis & the Honeybears
Ryan Reynolds, chef Eric Ripert and the cast of the Broadway musical Anything Goes
Jim Carrey, Rosie Huntington-Whiteley, Todd Rundgren
Samuel L. Jackson, Texas Ranger Josh Hamilton, Jennifer Hudson
Cameron Diaz, Eddie Vedder
Jason Bateman, Amy Sedaris, Top Ten by Keith Olbermann, Drive-By Truckers
Kevin James, pet fashion designer Ada Nieves, Beady Eye
Jason Segel, horse whisperer Buck Brannaman, Noah and the Whale
Shia LaBeouf, Bert Kreischer, Dawes
Tom Hanks, Sleepy Man Banjo Boys
Patrick Dempsey, Erica Hill, Marty Stuart
Julia Roberts, Cake
Emma Watson, George Lopez, Incubus
Roseanne Barr, Tom Felton, Blake Shelton
Ryan Gosling, Gomez
Kyra Sedgwick, Tim Harmston, Nikki Jean
Bono & the Edge, a performance from Spider-Man: Turn Off the Dark
Steve Carell, Hope Solo and Abby Wambach, The Del McCoury Band and the Preservation Hall Band
Jeremy Piven, Captain Luis Montalvan, Cee-Lo Green
Harrison Ford, Porcelain Black
Brian Williams, Tim Robbins & the Rogues Gallery Band
Julianne Moore, Johnny Galecki, Tanner Foust, Eels
Craig Ferguson, Connie Britton, Anna Calvi
Kirstie Alley, Louis C.K., Fountains of Wayne
James Franco, Dianna Agron, Christina Perri
Ricky Gervais, Cat Deeley, Explosions in the Sky
Emma Stone, Alan Mulally, Sallie Ford
Colin Farrell, Christopher Ferguson, Typhoon
Denis Leary, Elizabeth Cook, Drum Solo Week II kicks off with Tony Royster Jr.
Rachel Maddow, Rose Byrne, Gavin Harrison
Ashton Kutcher, Rafael Nadal, Stewart Copeland
Paul Rudd, Bill Burr, Dennis Chambers
Jason Sudeikis, Bettina Luescher, St. Vincent
Alec Baldwin, Joe Namath, Lenny Kravitz
David Arquette, Aubrey Plaza, Thurston Moore
Julianna Margulies, Joe Wong, Lady Antebellum
Kim, Kourtney & Khloe Kardashian, Michael Emerson, The Jim Jones Revue
Sgt. 1st Class Leroy Petry, Sarah Jessica Parker
Michael J. Fox, Top Ten by the cast of Two and a Half Men, Jim McDonald, John Doe
Dr. Jill Biden, Ted Danson
Jonah Hill, Paula Abdul, Coldplay
Taylor Lautner, Minka Kelly, Wilco
Sergeant Dakota Meyer, Sofia Vergara, Chris Cornell
Nathan Fillion, Larry Miller, The Jayhawks
Seth Rogen, Poppy Montgomery, Fleet Foxes
Jack Hanna, Anna Faris
Anderson Cooper, Nick Offerman, The Knux
Kaley Cuoco, Skipper Bivins & Trent Jackson, Death Cab for Cutie
Samuel L. Jackson, Karen Rontowski, Anne-Sophie Mutter
Brian Williams, Sting
Hugh Jackman, Sean Young, Feist
George Clooney, Mastodon
Caroline Kennedy, dock diving dogs, The Joy Formidable
Bryan Cranston, Jeff Altman, Garland Jeffreys
Tracy Morgan, Mike Golic & Mike Greenburg, Mates of State
Matthew Broderick, horse wrangler Erin Bolster and her horse Tonk, Hunter Hayes
Bill Clinton, Deer Tick
Bill O'Reilly, Martina McBride
Artie Lange, Eddie Brill, Beirut
Salma Hayek, Keith Olbermann, Jane's Addiction
Eddie Murphy, Jane Levy, Mayer Hawthorne
Justin Timberlake, Jennifer Esposito, The Civil Wars
Johnny Depp, Foster the People
Tom Brokaw, Myq Kaplan, The Head & The Heart
Tony La Russa, Jesse Eisenberg, Puscifer
Ben Stiller, Whitney Cummings
Condoleezza Rice
Mark Harmon, Mike Judge, Top Ten by Matt Lauer, Eli Young Band
Bill Cosby, Jason Isbell and The 400 Unit
Melissa McCarthy, Anthony Bourdain, Joan Baez & Kris Kristofferson
Robert Pattinson, Annie Leibovitz, David Crosby and Graham Nash
Adam Sandler, Peter Gabriel
Stupid Humans Tricks, Katie Holmes, Noel Gallagher's High Flying Birds
Steve Martin, Felicity Jones, Lonesome River Band feat. Steve Martin
Jason Segel, Jamie Oliver, The Kooks
Bill Maher, Nikki Reed, Foo Fighters feat. Joan Jet
Jerry Seinfeld, Lykke Li
Regis Philbin, John Fogerty
Herman Cain, Grouplove
Andy Kindler, Ty Burrell, Gayle King, Needtobreathe
Amy Sedaris, Christopher "Mad Dog" Russo, Sondre Lerche
Justin Bieber, Brian Regan, FreeSol
Jonah Hill, Kristen Johnston, Ryan Adams
Matt Damon, Shelby Lynne
Jessica Biel, Tom Dreesen, The Black Keys
Charlize Theron, Kevin Nealon, Blitzen Trapper
David Duchovny, Comedian Hugh Fink, Young Jeezy
Scarlett Johansson, Julie Chen, Top Ten by the 2011 Heisman Trophy winner Robert Griffin III
Barbara Walters, Bill Hader, Wild Flag
Robert Downey Jr., Rooney Mara
Tom Hanks, My Morning Jacket
Jude Law, Bob Sarlatte, Gary Clark Jr.
Tom Cruise, Anthony Hamilton, Top Ten by Mitt Romney
Harry Connick Jr., Scott Van Pelt, Mariachi El Bronx
Jon Huntsman, J. Cole
Anderson Cooper, Lindsey Vonn, Childish Gambino
Jay Thomas, David Hyde Pierce, Darlene Love
