AI S9 Auditions Katy Perry Joins the American Idol Season 9 Judges Panel Thursday In LA, Avril Lavigne Set for Friday 09/03/2009 mj santilli 10 Third Round auditions are taking place right now in Los Angeles for Season 9 of American Idol. Katy Perry sat on the judges panel with Randy Jackson, Kara DioGuardi and Simon Cowell on Thursday, Avril
