Nick Jonas goes shirtless for 'Careful' teaser

The JoBros may be no more, but Nick Jonas is still keeping busy -- and fit, apparently.

Jonas, 20, has been hard at work on a forthcoming film, "Careful What You Wish For," which is scheduled for release next year. To help raise the hype, the film's producers dropped this 23-second teaser trailer yesterday, and promised that the real trailers would come out soon, as well.

The youngest Jonas Brother has some acting experience -- the group got their start on the Disney Channel, where Nick starred in two original films -- but has never been on the big screen.

The teaser is good news for fans of the Jonas Brothers, who announced that creative differences had forced the group to cancel concerts and take some time off.

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