Because performing in a stationary room is way too easy, we present the Popdust Party Bus, where our favorite pop stars play their hits in front of a handful of lucky fans on a tricked-out mini-bus.

Today on the Party Bus... all growed-up teen-pop sensation JoJo, who's back with "Disaster," her first single in four years. Find out where she's been holed up all this time, and hear her belt out a stripped-down version of her still-awesome kiss-off "Leave (Get Out)."