It has been a summer of rumors for American Idol ever since Jennifer Lopez and Steven Tyler announced they would be leaving American Idol 2012 after two years as judges. Who would fill their seats and would Randy Jackson return? Mariah Carey was announced as a new judge back in July and the rumors have been flying ever since, but now we know for sure. FOX announced that Nicki Minaj and Keith Urban will be joining Mariah at the judges’ table and coming back for American Idol Season 12 (and his twelfth with the American Idol) is Randy Jackson.