Behind the feedback and distortion, even the hardest band appreciates a good power ballad or 80s pop hit. Case in point: When Disturbed released their cover of Simon & Garfunkel's "Sound of Silence" in 2015, mainstream music audiences were stunned by their arrangement and performance of the 60s hit.
They're not the only ones to take on some unexpected music - other hard rock and metal bands have come up with strange covers of their own. From Metallica to Marilyn Manson, it's not uncommon for heavy bands to wear some of their less obvious influences on their sleeve for a moment and tip their hat to the music they love.
Here are some of the most surprising cover songs by hard rock bands.