While we're at it, how about a Japanese one? "Beast of Blood" from Malice Mizer! I couldn't breathe after watching this, I was laughing so hard! The song is legendary in Jrock/Visual Kei circles, and the actual video is kinda cool, but this just takes it to a whole new level! Enjoy!
There are a ton of these on YouTube for Nightwish, Sonata Arctica, even Rammstein and The Clash! Most of them are pretty funny but there are a few duds out there.