Dude if you want to learn a language don't try to do it the easy way, pick a band that speaks/sings at an almost normal tempo and it will do wonders for the practical application of your language skills. Some Rammstein songs helped me quite a bit, though some songs are either a bit too fast to actually help and/or the guy isn't easy to understand.

I'd suggest Wollt Ihr Das Bett In Flammen Sehen?, Asche zu Asche, Ich Will and other relatively slow Rammstein songs as a comprehension aid. Lindemann sings/speaks at about a normal German tempo so it will help, plus it gives you some random vocab, and if you like the music you'll listen to it more and repetition always helps!!!