JoJo will join Joe Jonas and Jay Sean on their 19-city North American concert tour this fall.  The tour will kick off September 6th in JOJO’s native town of Boston, the same day her new single “Disaster” will be available at all digital retailers. “Disaster,” written by JoJo and Gino Barletta and produced by Mario Marchetti,  is the first single off her highly anticipated third album Jumping Trains (Blackground-Interscope/Streamline) which will be released in early 2012.