 Archuleta received his ticket to the Hollywood auditions at the San Diego tryouts – held at Qualcomm Stadium at the end of July 2007 – with a performance of John Mayer 's " Waiting on the World to Change " with judge Randy Jackson spontaneously joining in to sing the background " waiting " in the song . He was sixteen during the Hollywood auditions and attended school while a part of American Idol 's seventh season . A parent / guardian was required to be there because he was a minor . Archuleta also took advantage of the decision to allow contestants to play musical instruments when he accompanied himself on piano for his performances of " Crazy " , " Another Day in Paradise " , and " Angels " . 
