I don't know if I'm supposed to share this or not since I work in radio but today we (and I'm assuming some other stations) got a press release from Pepsi that says "You saw her perform ____ on the Superbowl" and then there's a link in the image that says "Buy on iTunes" - It says please do not share/post until AFTER Halftime Show airs  All I can say is that it's a single from Joanne, a real single, so that leaves you with one of two choices I'm not confirming the song on here in case