10 Rock Songs That Are A Nightmare To Sing

10. The Number of the Beast - Iron Maiden

As the years have gone on, metalheads have come into their own as having some of the more difficult karaoke jams in their arsenal. Since the entire appeal of the music is to be as extreme as possible, it makes sense that you'd want the actual vocalist to follow suit. Then again, when you get a name like the Human Air Raid Siren, fans better stand the hell back before taking on Number of the Beast.

Before you even get behind the actual melody, the sheer power of Bruce Dickinson's voice is enough to keep you on your toes, considering his bellowing register being the benchmark for every other metal band going forward. While everything starts off with a slow and hushed tone, the intro keeps building and building in intensity before giving way to one of the most powerful screams to be captured on a metal release.

This kind of impressive howl is almost impossible to reproduce exactly right, with Dickinson himself not even having the capacity to recapture it when it came time to do a second take. Although a handful of Iron Maiden's hits could make an entire ranking on this list by themselves, the fact that the man himself can't even do this anymore is a testament to them being on a whole different level than their peers.