Janet Jackson

60 min

Donald Elson, Kosta Trouva

60 min

Howie Mandel, Juliette Lewis

60 min

Denzel Washington, Hilary Duff

60 min

Tom Felton, Ne-Yo

60 min

David Arquette, Ashley Greene, Billy the Exterminator

60 min

Billy Bob Thornton, Kunal Nayyar, Ice Cube

60 min

Dwayne Johnson, Katie Cassidy

60 min

Jennifer Love Hewitt

60 min

Bill Cosby, Angela Kinsey, Atomic Tom

60 min

Charles Barkley, Brandy, Cee-Lo Green

60 min

Mario Lopez

60 min

Khloe Kardashian, Jo Frost, Nicki Minaj

60 min

Bob Saget, Nene Leakes, Keri Hilson

60 min

Alan Cumming, Chris D'Elia

60 min

Steve Harvey, the 88

60 min

Eric Stonestreet, J.B. Smoove, Dov Davidoff

60 min

Anna Faris, Apolo Anton Ohno, Natasha Bedingfield

60 min

Mila Kunis, Dr. Drew Pinsky, Chrisette Michele

60 min

Justin Timberlake, Stephen Dorff, Ciara

60 min

Xzibit, a performance from Cirque Du Soleil's "Mystere"

60 min

Gene Simmons, Scott Bakula, Bettye Lavette with the Ese Vatos

60 min

Ron Artest, will.i.am, Dean Cole

60 min

Jack Black, Hailee Steinfeld, Filter

60 min

Lauren Graham, Will Sasso, Plain White T's

60 min

Mary Lynn Rajskub, Maz Jobrani

60 min

El Debarge featuring Faith Evans, Michael Bearden & the Ese Vatos

60 min

David Duchovny, Kristen Schaal, Saving Abel

60 min

Seth Rogen, Ginnifer Goodwin, Sick Puppies

60 min

William H. Macy, Camille Grammer, Cali Swag District

60 min

Cameron Diaz, Jason Priestley, Luke Perry, Greg Fizsimmons

60 min

Bill Engvall, Johnny Weir, My Chemical Romance

60 min

Ashley Tisdale, Kevin Hart, Grace Potter & the Nocturnals

60 min

Vanessa Williams, Shorty Rossi

60 min

Jason Statham, Busy Philipps, Wiz Khalifa

60 min

Jennifer Love Hewitt, Guy Fieri

60 min

Kristen Bell, Jake Johnson, Slash

60 min

DeSean Jackson, the Thermals

60 min

Mindy Kaling, Derek Fisher, Jasper Redd, Arturo Sandoval

60 min

Billy Gardell, Rachel Bilson, OK Go

60 min

Jamie Foxx, Aubrey Plaza

60 min

Channing Tatum, Margaret Cho, 50 Cent with Governor

60 min

Joan Rivers, Greg Jennings, Baron Vaughn

60 min

Brad Womack, Taylor Momsen, the Pretty Reckless

60 min

Justin Bieber, Far East Movement

60 min

Liam Neeson, a performance by the Broadway cast of "Rock of Ages"

60 min

200th Episode - Jenni "JWoww" Farley, Jim Jefferies

60 min

Amar'e Stoudemire, Kate Gosselin, Sebastian Maniscaclo

60 min

Martin Lawrence, Jared Leto, 30 Seconds to Mars

60 min

Forest Whitaker, Jessica Lucas, Bobby V & Bobby Brown

60 min

Jason Biggs, Anne Heche

60 min

Owen Wilson, Aly Michalka, Terry Fator

60 min

Cheryl Burke, Brandon T. Jackson, John Popper & the Duskray Troubadours

60 min

Ron Artest, DJ Pauly D, Michelle Rodriguez, Future Funk

60 min

Topher Grace, Scott Disick, Cake

60 min

Forest Whitaker, Donald Glover, Steel Train

60 min

Aaron Eckhart, Malin Akerman, Eric Andre

60 min

Curtis Stone, Lupe Fiasco

60 min

Pee-wee Herman, Emanuelle Chriqui

60 min

Mike Tyson, Emmy Rossum, 30 Seconds to Mars

60 min

Jim Rome, Boney James

60 min

Matthew McConaughey, Micky Ward, Ron Artest featuring George Lopez, Fat Joe, B Real, Lenny and Max from Aventura and Taz

60 min

Bethenny Frankel, D.L. Hughley, Seether

60 min

Vanessa Hudgens, Sergio Mendes

60 min

Larry King, Brent Weinbach

60 min

Snoop Dogg, Brittany Snow

60 min

Lil Jon, Panic! At The Disco

60 min

Drew Carey, Sarah Shahi, Quinn Dahle

60 min

Lisa Lampanelli

60 min

Danny McBride, Camilla Luddington, Avril Lavigne

60 min

Kathy Griffin, Tom Felton

60 min