How the Lady Gaga, Metallica Duet Happened at the 2017 Grammy Awards | ABC News

How the Lady Gaga, Metallica Duet Happened at the 2017 Grammy Awards | ABC News

How the Lady Gaga, Metallica Duet Happened at the 2017 Grammy Awards | ABC News How the Lady Gaga, Metallica Duet Happened at the 2017 Grammy Awards | ABC News - Related Videos