Gaga's performance was reportedly revealed via a TV spot aired Monday night (February 6), and Rolling Stone has confirmed that she'll be joining Metallica onstage on Sunday (February 12). There's no word yet as to what exactly they'll be performing together, but the mashup opportunities are abundant. "Some Kind of Mother Monster?" "Master of Paparazzi?" "Enter Joanne?"
Like Gaga and team sports, it's an unexpected pairing, but definitely an intriguing one.