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!

13 of 20

BROOKE BURNS

"I was glued to my mom," says the Hole in the Wall cohost, then 2, at left with her fellow Raggedy Anns. "We were just doing the whole family thing!"