Metallica drummer Lars Ulrich has revealed that Lady Gaga is the "perfect fifth member" of his band and they can't wait to work with the pop superstar again in the future. 

They performed 'Moth Into Flame' together at the 2017 GRAMMY Awards this past weekend and Ulrich told the Rolling Stone that she was such a wonderful live collaborator:

“[She is the] quintessential perfect fifth member of this band. Her voice, her attitude, her outlook on everything is so awesome. [The performance] was so effortless and organic and she just has the spirit of hard rock and metal flowing through her veins. It comes really easy for her. There’s nothing contrived; she just has this super warm, easy energy.”

“We already started fast-forwarding to the next chapter when we can do more of this. It’s not one of those ’20 lawyers, strategists and managers trying to force two people from two different worlds to figure out how to spend four minutes together on a national telecast. Of any of these undertakings, this is about as organic and authentic as there’s ever been one. We’re just getting started.”

Watch their live performance at the GRAMMYs below: