This a Capella group, Duwende, posted a bunch of Michael Jackson songs, and they're all incredible. The first one that caught my eye [err... ear?] was Thriller, though.
I guess they know that's what they're good at and what a lot of people will be drawn to, because they did some more MJ faves:
Remember the Time-
Gah. I am officially and quickly OBSESSED! The guy who sings most of the Michael Jackson parts is really good. I WANT MORE!
While I go listen to them over and over again at high volumes in the studio, subscribe to them.