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!

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TOM & MIKE GOSSIN

The Gloriana rockers – here ages 6 and 3 – embraced their inner baddies for Halloween, dressing up as a pirate and devil. The getups "are probably the coolest costumes our mom dressed us up in," Mike says. "The others are too embarassing to show."