Actor David Duchovny; TV personality Tim Gunn; comic Kevin Brennan.
Actor Will Arnett; actor Terry Crews; Patti Scialfa performs.
Comic Jeff Garlin; actor Nicholas Art; Hot Hot Heat performs.
Actor Morgan Freeman; actress Cheryl Hines; KT Tunstall performs.
Actor Brad Garrett; comic Joy Behar; Rogue Wave performs.
Journalist Meredith Vieira; comic Steven Wright; Ben Harper and the Innocent Criminals perform.
Actor Jamie Foxx; actress Heather Graham; comic Mike Birbiglia.
Actor Ted Danson; comic Patton Oswalt; Devendra Banhart performs.
Actor Dwayne ``The Rock'' Johnson; actor Ed Helms; Björk performs.
Actor Seth Meyers; singer Bret Michaels; José González performs.
Journalist Ted Koppel; actor Jason Schwartzman; comic Dana Gould.
Actress Tina Fey; actor Kenneth Branagh; Ani DiFranco performs.
Actress Jennifer Connelly; actor Fred Willard; Animal Collective performs.
Actor Tracy Morgan; actor Emile Hirsch; author A.J. Jacobs.
Singer Jon Bon Jovi; actress Eva Mendes; Klaxons perform.
Actor Jake Gyllenhaal; actress Christina Hendricks; Ghostland Observatory performs.
Actor Anthony Hopkins; sportscaster Joe Buck; Mute Math performs.
Actor John Cusack; TV personality James Lipton; Spoon performs.
Actor Josh Hartnett; actor Jack McBrayer; Brother Ali performs.
Former basketball player Charles Barkley; actor Billy Baldwin; Seether performs.
Journalist Brian Williams; singer Roger Daltrey; Manchester Orchestra performs.
Actor Dane Cook; actress Emily Mortimer; guitarist Slash.
Actor Jerry Seinfeld; ballplayer David Ortiz; Sondre Lerche performs.
Television host Howie Mandel; cheerleader Leigh Killian; Kate Nash performs.
Journalist Lester Holt; sex educator Sue Johanson; Ingrid Michaelson performs.
Author Tom Brokaw; comic Anthony Jeselnik; Bell X1 performs.
Singer Pink; journalist Lou Dobbs; Bettye LaVette performs.
Actor Chazz Palminteri; journalist Erin Burnett; Louis XIV performs.
Singer Bret Michaels; football player Antonio Pearce; Lisa Loeb performs.
Comic Jim Gaffigan; martial artist Chuck Liddell; Joe Nichols performs.
Journalist David Gregory; motocross champion Travis Pastrana; Kate Walsh performs.
Animal handler Jeff Corwin; actor Colin Hanks; Matt Nathanson performs.
Dr. Phil McGraw; author David Borgenicht; Les Savy Fav performs.
Robot operator Shawn Thayer; extreme skier Ingrid Backstrom; The Blind Boys of Alabama perform.
Journalist Ann Curry; comic Mike Epps; OneRepublic performs.
Professional football player Michael Strahan; actress Sarah Bolger; Sheryl Crow performs.
Knife thrower The Great Throwdini; TV personality Donny Deutsch; The Dillinger Escape Plan performs.
Supermodel Izabel Goulart; sportscaster Len Berman; Nada Surf performs.
Physics professor Peter Fisher; Dr. Bob Arnot; Eric Lindell performs.
TV personality Carson Kressley; music critics Jim DeRogatis and Greg Kot; Catherine Russell performs.
TV personality Jim Cramer; chef Jose Andres; Band of Horses performs.
Journalist Matt Lauer; actor Ryan Reynolds; Simple Plan performs.
Actor Martin Short; basketball player Ray Allen; the Kooks perform.
Actor Neil Patrick Harris; model Daniella Sarahyba; Yeasayer performs.
Comic Larry the Cable Guy; TV personality Tim Gunn; Jim Lauderdale performs.
Actor Bill Hader; Jake Shimabukuro performs.
TV personality Randy Jackson; actor Artie Lange; the Whigs perform.
Journalist Barbara Walters; boxer Wladimir Klitschko; Black Mountain performs.
Actor Nathan Lane; director Michel Gondry; Secondhand Serenade performs.
Actor Will Arnett; reality TV star Flavor Flav; Super Furry Animals performs.
Actor Will Ferrell; actress Rashida Jones; tae kwon do instructor Fred Simmons.
Actor Tom Arnold; comic Todd Barry; Georgie James performs.
Actress Natalie Portman; comic Robert Schimmel; James Blunt performs.
Actress Christina Ricci; actor Jason Sudeikis; Shooter Jennings performs.
Actor Paul Giamatti; ecologist Mark Moffett; Jaymay performs.
Actor Jonah Hill; musician John Tesh; Drive-By Truckers perform.
Rapper Snoop Dogg; talk-show host Carson Daly.
Journalist Meredith Vieira; actor Harland Williams; comic Keith Robinson.
Comic Frank Caliendo; actress Cheryl Hines; the Bad Plus performs.
