Video: Lady Gaga and Metallica’s Grammy Rehearsal of ‘Moth Into Flame’ Went Perfectly

Here’s how their rock performance should have sounded had James Hetfield's mic not cut out on live TV

New video of Lady Gaga and Metallica at the Grammys dress rehearsal is showing fans how their live televised performance should have sounded. The two music acts came together to rock out to the heavy metal band's hit song "Moth Into Flame" but during their performance on the actual award ceremony, frontman James Hetfield's mic failed, leaving him unheard by both the audience watching at home and in person at the Staples Center.

Now, Metallica has released new footage of their pre-show run-through with Gaga that went off without an issue. Check it out (above).