When Metallica said they had "something very unique and special planned" for their return to the Grammys, I can't imagine anyone guessed it was a duet with Super Bowl halftime performer Lady Gaga.
But that's what's happening Sunday, as the collaboration was announced during a promo for the awards on CBS late Monday night. Gaga has long been known as a metal fan, so this pairing isn't as far-fetched as it might seem. As for what song they'll be doing, we'll all find out Sunday night.
This could work! I can't wait!
Source: Grammys.com photo credit - iHM archive