As I've said many times before, I'm not a huge fan of mashups. Most of them just aren't good, the songs are off key, and they don't sound right together.
But when they're done well, they deserve credit. This one, done by someone called "DJ Cumberbund," is really good.
It's a mashup of Ozzy Osbourne's "Crazy Train" and Earth Wind & Fire's "September"
What do you think?