Its absolutely happening. One of gaga's (and other artists') occasional creative designers posted on facebook that he booked the gig (as well as the AMA Awards btw..)
well atrl told me that gaga is a has-been. i guess nothing changed.
If this is true, surely they won't be mad at her for nabbing the coveted HT spot. And surely they weren't expecting their faves to nab it, since they claimed it is indeed for has-beens.