The GRAMMYs 2017 performance of Lady Gaga and Metallica sounded too wild to believe, but the collaboration actually was one of the most thrilling performances of the night...with only a slight technical glitch.

The pop star and metal outfit came together to sing "Moth Into Flame," a cut off Metallica's 2016 album Hardwired... to Self-Destruct, with Gaga seeming right at home as she donned a cut-up Metallica T-shirt. Sadly, Metallica singer James Hetfield's microphone was not working properly at first but luckily Hetfield joined his pop star collaborator at her mic before his fixed itself.

The performance was unexpected, but still slayed the stage. Gaga even channeled her inner rocker and jumped into the crowd for stage dive.

Keep up with all things GRAMMYs 2017 right here. Below, watch a throwback interview with Lady Gaga before she was a certified metalhead: