There's never a dull moment on tour with the Jonas Brothers! Not only do Nick, Joe, and Kevin have theme nights backstage -- Pirate night, Hawaiian night, for example -- they have been keeping everyone on their toes during their nightly sound checks -- by wearing different costumes! And the boys have been posting their crazy antics via their Twitter. Last night was a moose costume (pictured above).

Check out some of their other costumes:

What kind of costume should JB wear next?

Photos: Courtesy of the Jonas Brothers' Twitter