You're free to request tickets like everyone else, but unfortunately we can not make special concessions for friends/family of auditioning artists.  These shows are a strange animal, as your friend could be scheduled to shoot on a Monday, but ends up shooting on Wednesday because of the progression of the tapings ... or, they could end up not performing at all if all of the teams fill up before he/she takes the stage.  So, we do not make special arrangements.  There are many fans of this show, and we want to give tickets to as many as possible.  For that reason, we don't make special arrangements like this.