Summer Advisory: A Jonas Front Looms

The brothers ? Kevin, 20, Joseph, 18, and Nick, 15 ? are to be fully unleashed on the American public starting Tuesday night, when a preview of their new movie, ?Camp Rock,? will be made available on Disney Channel on Demand, a limited-availability service offered to some Time Warner Cable, Cablevision and Verizon customers. On Friday the movie will begin its run on the Disney Channel, with an audio simulcast on Radio Disney, followed by broadcasts on ABC on Saturday and the ABC Family channel on Sunday.

And that is just the start of the Summer of Jonas. Within hours of completing work last month on the video for their new single, ?Burnin? Up,? the brothers departed for Glasgow to begin a 24-date European concert tour. That is to be followed by a 46-date North American tour, beginning July 4 in Toronto ? their fourth in little over a year. A 3-D film for theatrical release next year will be shot during the tour, following the richly successful formula set by Miley Cyrus on her recent Hannah Montana ?Best of Both Worlds? tour.

The music video, which will be shown for the first time on Friday on the Disney Channel following ?Camp Rock,? presages the Aug. 12 release of the brothers? third album, ?A Little Bit Longer.? In the fall, after the tour ends, they will begin shooting their own Disney Channel series, a comedy-adventure spy series titled ?J.O.N.A.S.?

All of which ? not to mention the piercing teenage-girl screams that accompany their every move ? has the brothers? heads spinning a bit. ?We wake up and pinch ourselves most days,? Kevin Jonas said in an interview.