News anchor Brian Williams; TV personality Paula Abdul.

Singer Tim McGraw; NBA player Shaquille O'Neal; Keri Hilson performs.

Actress Jennifer Connelly; talk show host Dr. Mehmet Oz; Justin Townes Earle performs.

Actor Seth Rogen; actress Beau Garrett; the Walkmen perform.

TV host Regis Philbin; comic Hannibal Buress; No Age perform.

Comic Bill Cosby; reality TV star Nicole 'Snooki' Polizzi presents the top 10 list.

Actor Vince Vaughn; reality TV stars Mike Wolfe and Frank Fritz; Cage the Elephant performs.

Actor Kevin James; actress Olivia Munn; Blake Shelton performs.

Gregg Allman performs.

Comics Joan Rivers and Jeff Caldwell; Wintersleep performs.

Animal handler Jack Hanna; musician Steven Tyler.

Actress Betty White; reality TV stars Kim and Kourtney Kardashian; The Script performs.

Actor Martin Short; Darius Rucker performs.

Actress Kaley Cuoco; TV host Piers Morgan; Wanda Jackson and Jack White perform.

Actor Nathan Lane; comic Mike Palascak; Esperanza Spalding performs.

Musician Justin Bieber; actress Pauley Perrette; Best Coast performs.

Actor Matthew Perry; actor Chris Elliott; former Gov. Mitt Romney (R-Mass.); The National performs.

Actress Kate Walsh; comic Jim Gaffigan; Boxer Rebellion performs.

Radio host Howard Stern; Naughty by Nature performs.

Musician Justin Bieber presents the top 10 list; Martha Stewart; Robert Plant performs.

Martin Lawrence

Adam Sandler, Chris Colfer, Gang of Four

Elton John, Ty Burrell, Elton John & Leon Russell

Bryan Ferry

Ed Helms, Ted Alexandro, Steel Magnolia

A Top Ten List with 10 Sports Illustrated swimsuit models, Theophilus London

The 2011 Sports Illustrated swimsuit issue cover model, Josh Groban

Amos Lee

Paris Hilton, Scissor Sisters

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

Donald Rumsfeld, Adele

Amy Poehler

Rainn Wilson, Henry "Hank" Aaron, the Mountain Goats

Sen. Rand Paul, Bright Eyes

Matthew Morrison, Jeff Altman

Brian Williams, Trey Parker & Matt Stone, Zac Brown Band

Amanda Seyfried, B.J. Novak, a performance by the Broadway cast of "Spider-Man: Turn Off the Dark"

Donald Trump, Vanessa Hudgens, Oh Land

Robin Williams, Judy Greer

Charles Barkley, Sarah Vowell, Cold War Kids

Charles Barkley, 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

Jack Hanna, Danny McBride

Regis Philbin, Snoop Dogg

Norm MacDonald, C.C. Sabathia, Willie Nelson, Norah Jones, Wynton Marsalis

Chris Rock, Ellen Page, Funeral Party

James Franco, Royal Bangs

TBA

Jennifer Garner, Jamie Oliver, Robbie Robertson

Don Rickles, Eva Longoria

Alec Baldwin, Wiz Khalifa

Ricky Gervais, Bjorn Lomborg, 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, Chris Cornell

TV-show host Bill Maher; actress Cote de Pablo; Lupe Fiasco performs.

Actor Will Ferrell; Twilight Singers perform.

Actress Kate Hudson; sportscaster Rich Eisen; Emmylou Harris performs.

TV host Phil McGraw; actor Chris Hemsworth; the Broadway cast of "Catch Me if You Can" performs.

Actor John Krasinski; comic Brian Kiley; Steve Earle performs.

Tracy Morgan, Rex Ryan

Caroline Kennedy, Ty Burrell

Brian Williams, Rick Harrison, a Top Ten List presented by Betty White

Jodie Foster, Tom Dreesen, Neon Trees

Mike Birbiglia, "The Human Fuse" Brian Miser, Brother

Albert Brooks, Kristen Wiig

Mark Harmon, Chris Morgan, Hugo

Keith Olbermann, Chaz Bono, Ray LaMontagne

Jim Parsons, Manchester Orchestra

Nick Griffin, Okkervil River

Julianna Margulies, Andy Cohen, White Lies

Martin Short, Melissa McCarthy, Tinie Tempah

Keith Olbermann, Julie Bowen, Ben Harper

Kelly Ripa, Jennifer Lawrence, a performance by the Broadway cast of "How to Succeed in Business Without Really Trying"

Tracy Morgan, Jake Johannsen, the Airborne Toxic Event

Musician Lady Gaga; actor Eric Stonestreet; the Vaccines perform.

Actor Ewan McGregor; journalist Scott Pelley; Brad Paisley performs.

Piedmont Bird Callers perform; actor Kevin Bacon; Augustana performs.

Actor Ray Romano; Arctic Monkeys perform.

Meredith Vieira, Indianapolis 500 winner Dan Wheldon, Drum Solo Week kicks off with Anton Fig

Kyle Chandler, Kathy Griffin, Sheila E.

Jon Cryer, Roy Haynes

Neil Patrick Harris, Mike Birbiglia, Neil Peart

Adm. Michael Mullen, a Top Ten List presented by Betty White, Black Joe Lewis & the Honeybears

Ryan Reynolds, a performance by the Broadway cast of "Anything Goes"

Jim Carrey, Rosie Huntington-Whiteley, Todd Rundgren

Samuel L. Jackson, Texas Ranger Josh Hamilton, Jennifer Hudson

Cameron Diaz, horse whisperer Buck Brannaman, Eddie Vedder

Jason Bateman, Amy Sedaris, a Top Ten List presented by Keith Olbermann, Drive-By Truckers

Kevin James, pet fashion designer Ada Nieves, Beady Eye

Jason Segel, Tim Harmston, Noah and the Whale

Shia LaBeouf, Bert Kreischer, Dawes

Tom Hanks, Sleepy Man Banjo Boys

Patrick Dempsey, Marty Stuart

Julia Roberts, Cake

Emma Watson, George Lopez, a Top Ten List presented by Chris Evans, 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, the Del McCoury Band, the Preservation Hall Jazz Band

Jeremy Piven, Cee-Lo Green

Harrison Ford, Joe Wong, Porcelain Black

Brian Williams, Tim Robbins & the Rogues Gallery Band

Julianne Moore, Eels

Craig Ferguson, Anna Calvi

Louis C.K., Fountains of Wayne

James Franco, Dianna Agron, Christina Perri

Ricky Gervais, Cat Deeley, Explosions in the Sky

Emma Stone, Alan Mulally, Blink 182

Colin Farrell, Karen Rontowski, Typhoon

Denis Leary, Elizabeth Cook, Drum Solo Week II kicks off with Tony Royster Jr.

Rachel Maddow, Gavin Harrison

Ashton Kutcher, Stewart Copeland

Paul Rudd, Bill Burr, Dennis Chambers

Actor Jason Sudeikis; World Food Programme director Josette Sheeran; The Jim Jones Revue performs.

Actor Alec Baldwin; former professional football player Joe Namath; Lenny Kravitz performs.

Actress Aubrey Plaza; Thurston Moore performs.

Actress Julianna Margulies; comic Joe Wong; Lady Antebellum performs.

Kim, Kourtney & Khloe Kardashian, Michael Emerson, the Jim Jones Revue

Sgt. 1st Class Leroy Petry, Sarah Jessica Parker

Michael J. Fox, John Doe

Ted Danson

Jonah Hill, Paula Abdul, Coldplay

Taylor Lautner, Minka Kelly, Wilco

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

Karen Rontowski, Anne-Sophie Mutter

Brian Williams, Sting

Hugh Jackman, Feist

George Clooney, Mastodon

Caroline Kennedy, dock diving dogs, the Joy Formidable

Bryan Cranston, Jeff Altman, Garland Jeffreys

Tracy Morgan, Mike Golic & Mike Greenburg

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

Coming soon...Salma Hayek, Louis Zamperini, Jane's Addiction

Eddie Murphy, Jane Levy, Mayer Hawthorne

Justin Timberlake, the Civil Wars

Johnny Depp, Foster the People

Tom Brokaw, the Head & the Heart

Jesse Eisenberg, Puscifer

Ben Stiller, Whitney Cummings

Condoleezza Rice, Amy Sedaris

Mark Harmon, Eli Young Band

Bill Cosby, Jason Isbell and the 400 Unit

Melissa McCarthy, Anthony Bourdain, Joan Baez & Kris Kristofferson

Robert Pattinson, Annie Leibovitz

Adam Sandler, Peter Gabriel

Katie Holmes, Noel Gallagher\'s High Flying Birds

Steve Martin, Felicity Jones

Jason Segel, Jamie Oliver

Bill Maher, Nikki Reed, Drake

Jerry Seinfeld, Lykke Li

Regis Philbin, John Fogerty

Herman Cain, Brian Regan, Grouplove

Ty Burrell, Needtobreathe

Amy Sedaris

Justin Bieber, Hugh Fink

Jonah Hill; Kristen Johnston; Ryan Adams

Matt Damon; Shelby Lynne

Jessica Biel; Tom Dreesen; The Black Keys

Charlize Theron; Kevin Nealon; Blitzen Trapper

Hugh Fink; Young Jeezy

Scarlett Johansson, Julie Chen

Barbara Walters, Bill Hader, Wild Flag

Robert Downey Jr., Lisa Lampanelli

Tom Hanks, My Morning Jacket

Jude Law, Bob Sarlatte, Gary Clark Jr.

Tom Cruise, Anthony Hamilton

Harry Connick Jr., Scott Van Pelt, Mariachi El Bronx

Jon Huntsman, J. Cole

Childish Gambino

Jay Thomas, Darlene Love