Lady Gaga has amazed the world with another out-of-this-world performance just weeks after her Super Bowl Halftime show appearance. She joined heavy metal band Metallica at the 59th GRAMMYs for a hot performance of ''Moth Into Flame'' a single from Metallica's 2016 album. Check out the full performance!

Yesterday during the rehearsal, Metallica's guitarist Kirk Hammett said:"You know how the Grammys like to have their duets thing and when it was suggested that Lady Gaga do it we thought, 'That's interesting. And when she came down to actually work with the song, it turned out really, really, really well. She was really open and willing to work with different arrangements and see what worked well over the course of the song. She was really great to work with."

Talking about Gaga too, the band's bassist added:"She's got a lot of edge and attitude which is important for what we do. And she actually came to see us play. We did a small show at the Henry Fonda theatre and she saw the whole show, stayed for it. She really enjoyed it, just rocking out. And somehow magically this all started to happen."