Struggling to come up with an idea for a Halloween costume? We've got you covered. Some of rock and metal's most legendary artists are very distinguishable, and they make for great Halloween costumes.

For starters, you're going to need a lot of black clothing, if you don't already own it. Throw some leather and some studs in there, maybe a bit of lace. Next is makeup — a few of these artists wear corpse paint while others just smear on the eyeliner, so stock up. Finally, for those who are being guitarists, get yourself a nice blow up guitar. It really adds to the look.

Here are 20 rockers you could easily be for Halloween, and be prepared to prove your knowledge of all things rock.

21 Rock and Metal Acts Who Are Always Ready for Halloween