Joe Jonas, one third of the teen pop sensation the Jonas Brothers, will be a guest judge during the audition rounds for American Idol‘s upcoming ninth season, a source close to the show confirmed to this evening. The source said news is cloudier concerning published reports that season 1 Idol champ Kelly Clarkson will also join Simon Cowell, Randy Jackson, and Kara DioGuardi at the judges’ table throughout the callback episodes filming in the next few weeks. It was previously announced that Shania Twain, Mary J. Blige, Katy Perry, and former Spice Girl Victoria Beckham have all been tapped to fill the seat once occupied by Paula Abdul, who stepped away from the show earlier this month after a bitter public contract dispute.