Metallica will reportedly be joined by Lady Gaga when they perform at the 59th annual Grammy Awards on February 12th if a alleged leaked television commercial is to be believed.
While neither artist has formally announced the news at press time, various media outlets - including Rolling Stone and music industry publication Billboard - have confirmed the pairing based on a tweet from a Gaga fan on Monday that shared a video clip of a TV commercial for the event that stated "Lady Gaga duets with Metallica."