I don't believe in the devil :)
evil knievel - THE ALBUM
I doubt that the Devil actually listens to heavy metal because it's just a stereotype about this kind of music. I'm pretty sure that if Devil existed, and he was just like in the Supernatural, he'd just be a music enthusiast. But I don't think he'd use music services, I'd say he would download everything to have music in the Mp3 format and have unlimited access to it. In general, it's quite an interesting topic to talk about.