Holy Dio that man is a monster.
There's a lot of cool stuff like this around the internet thanks to Rock Band / Guitar Hero. The vocal track for Michael Jackson - Beat It is pretty amazing too. You can hear all of his little vocal nuances.
And if you can track it down, the full 24 track multitrack for Bohemian Rhapsody is just one of the best things you'll ever hear. All of the vocals are at least double or triple tracked, and all of them are spot on.