The most unexpected duet is going down at The Grammy's

Grammys 08/02/2017

Um cool but like, what? Who knew that Gaga was such a heavy metal freak.

After smashing it at the Super Bowl halftime show, Lady Gaga will be hitting up the Grammy's stage with ~hard rockers~ Metallica.

Rolling Stone have confirmed that she'll be joining the boys onstage, but still no word on how the actual f*ck the performance will go down.

Like Gaga and sport is a weird mix, but Metallica, like wow okay girl you do you.