Janet Jackson
No overview available.
Donald Elson, Kosta Trouva
No overview available.
Howie Mandel, Juliette Lewis
No overview available.
Denzel Washington, Hilary Duff
No overview available.
Tom Felton, Ne-Yo
No overview available.
David Arquette, Ashley Greene, Billy the Exterminator
No overview available.
Billy Bob Thornton, Kunal Nayyar, Ice Cube
No overview available.
Dwayne Johnson, Katie Cassidy
No overview available.
Jennifer Love Hewitt
No overview available.
Bill Cosby, Angela Kinsey, Atomic Tom
No overview available.
Charles Barkley, Brandy, Cee-Lo Green
No overview available.
Mario Lopez
No overview available.
Khloe Kardashian, Jo Frost, Nicki Minaj
No overview available.
Bob Saget, Nene Leakes, Keri Hilson
No overview available.
Alan Cumming, Chris D'Elia
No overview available.
Steve Harvey, the 88
No overview available.
Eric Stonestreet, J.B. Smoove, Dov Davidoff
No overview available.
Anna Faris, Apolo Anton Ohno, Natasha Bedingfield
No overview available.
Mila Kunis, Dr. Drew Pinsky, Chrisette Michele
No overview available.
Justin Timberlake, Stephen Dorff, Ciara
No overview available.
Xzibit, a performance from Cirque Du Soleil's "Mystere"
No overview available.
Gene Simmons, Scott Bakula, Bettye Lavette with the Ese Vatos
No overview available.
Ron Artest, will.i.am, Dean Cole
No overview available.
Jack Black, Hailee Steinfeld, Filter
No overview available.
Lauren Graham, Will Sasso, Plain White T's
No overview available.
Mary Lynn Rajskub, Maz Jobrani
No overview available.
El Debarge featuring Faith Evans, Michael Bearden & the Ese Vatos
No overview available.
David Duchovny, Kristen Schaal, Saving Abel
No overview available.
Seth Rogen, Ginnifer Goodwin, Sick Puppies
No overview available.
William H. Macy, Camille Grammer, Cali Swag District
No overview available.
Cameron Diaz, Jason Priestley, Luke Perry, Greg Fizsimmons
No overview available.
Bill Engvall, Johnny Weir, My Chemical Romance
No overview available.
Ashley Tisdale, Kevin Hart, Grace Potter & the Nocturnals
No overview available.
Vanessa Williams, Shorty Rossi
No overview available.
Jason Statham, Busy Philipps, Wiz Khalifa
No overview available.
Jennifer Love Hewitt, Guy Fieri
No overview available.
Kristen Bell, Jake Johnson, Slash
No overview available.
DeSean Jackson, the Thermals
No overview available.
Mindy Kaling, Derek Fisher, Jasper Redd, Arturo Sandoval
No overview available.
Billy Gardell, Rachel Bilson, OK Go
No overview available.
Jamie Foxx, Aubrey Plaza
No overview available.
Channing Tatum, Margaret Cho, 50 Cent with Governor
No overview available.
Joan Rivers, Greg Jennings, Baron Vaughn
No overview available.
Brad Womack, Taylor Momsen, the Pretty Reckless
No overview available.
R. Kelly, Paul Wesley, James Loney, Bobby Castillo, Tommy Davis, Kenny Landreaux, Rudy Law, Steve Lyons, Don Mattingly
No overview available.
Justin Bieber, Far East Movement
No overview available.
Liam Neeson, a performance by the Broadway cast of "Rock of Ages"
No overview available.
200th Episode - Jenni "JWoww" Farley, Jim Jefferies
No overview available.
Amar'e Stoudemire, Kate Gosselin, Sebastian Maniscaclo
No overview available.
Martin Lawrence, Jared Leto, 30 Seconds to Mars
No overview available.
Forest Whitaker, Jessica Lucas, Bobby V & Bobby Brown
No overview available.
Jason Biggs, Anne Heche
No overview available.
Owen Wilson, Aly Michalka, Terry Fator
No overview available.
Cheryl Burke, Brandon T. Jackson, John Popper & the Duskray Troubadours
No overview available.
Ron Artest, DJ Pauly D, Michelle Rodriguez, Future Funk
No overview available.
Topher Grace, Scott Disick, Cake
No overview available.
Forest Whitaker, Donald Glover, Steel Train
No overview available.
Aaron Eckhart, Malin Akerman, Eric Andre
No overview available.
Curtis Stone, Lupe Fiasco
No overview available.
Pee-wee Herman, Emanuelle Chriqui
No overview available.
Mike Tyson, Emmy Rossum, 30 Seconds to Mars
No overview available.
Jim Rome, Boney James
No overview available.
Matthew McConaughey, Micky Ward, Ron Artest featuring George Lopez, Fat Joe, B Real, Lenny and Max from Aventura and Taz
No overview available.
Bethenny Frankel, D.L. Hughley, Seether
No overview available.
Vanessa Hudgens, Sergio Mendes
No overview available.
Larry King, Brent Weinbach
No overview available.
Snoop Dogg, Brittany Snow
No overview available.
Lil Jon, Panic! At The Disco
No overview available.
Drew Carey, Sarah Shahi, Quinn Dahle
No overview available.
Lisa Lampanelli
No overview available.
Danny McBride, Camilla Luddington, Avril Lavigne
No overview available.
Kathy Griffin, Tom Felton
No overview available.
