Jonas Brothers News: Video: Jonas Brothers Reveal Summer Tour Details!

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ET was with the Jonas Brothers, as the popular teen sensations gave us an exclusive look backstage at their upcoming world tour and details behind their upcoming new album. Plus, the three dish about inspiration for their lyrics -- was it their famous ex-girlfriends?

"We write songs about relationships and things we go through…," Joe tells ET when asked if their lyrics about love refer to their famous ex-girlfriends. "It could be -- it could not be, but I think I'll let the fans decide for themselves."

Kevin, Joe, and Nick discuss their excitement about their big tour, which has already...