Celebrity Circuit
Pictures: Jessica Biel
NEXT: Colin Farrell
NEXT: Kate Beckinsale
NEXT: Arnold Schwarzenegger
Pictures: Arnold Schwarzenegger
NEXT: Ryan Lochte
Pictures: Ryan Lochte
NEXT: Sylvester Stallone
NEXT: Jordin Sparks
Pictures: "American Idol" winners
NEXT: Jordin Sparks
Pictures: "American Idol" winners
NEXT: Joe Jonas
NEXT: "The Next" mentors
NEXT: Josh Hutcherson
Pictures: CBS' "Teachers Rock" special
NEXT: Viola Davis
Pictures: CBS' "Teachers Rock" special
NEXT: Miranda Cosgrove
Pictures: CBS' "Teachers Rock" special
NEXT: Fun
Pictures: CBS' "Teachers Rock" special
NEXT: Garth Brooks
Pictures: CBS' "Teachers Rock" special
NEXT: Jennifer Garner
Pictures: Jennifer Garner
NEXT: Heidi Klum
NEXT: Bruce Springsteen
Pictures: Bruce Springsteen
NEXT: Jennifer Lopez
Pictures: Jennifer Lopez
NEXT: Carrie Underwood
NEXT: Charlie Sheen
Pictures: Charlie Sheen
NEXT: Elizabeth Olsen
NEXT: "The Voice" judges
Pictures: Christina Aguilera