I saw this a couple years ago, but something made me search and find it again.
Personally, I’m blaming aliens.

This is exactly what YouTube and the interwebs are for – to bring us things like this a capella tribute to composer John “The Man” Williams. (side note: I don’t like the word “a capella”. It looks funny and sounds uppity.) You’ll notice the theme music of some popular movies being used as the soundtrack to a new song about our favorite far far away Galaxy.

Singer: Corey Vidal