Before They Were Stars: Halloween Costumes!

See Carrie Underwood as a bunny, Nick Jonas as the Blue's Clues pooch and more stars when they were still trick-or-treating!

9 of 20

AMANDA BYNES

"I dressed up as a bride because I loved pretending to be a housewife," says the actress of the getup she wore at age 9. "Now that I look back on it, I think I was a bit young to get married!"