Spike Jonze.
His committment and guts in this video are brilliant. This is one of the funniest and most amazing things I have ever seen.
I can't get enough of it.
Here's a neat bonus. Remember this Tainted Love Levi's commercial? Also Spike Jonze. (Thanks, youtube, for 'related videos'. I had no idea.)
And while we are talking about commercials, this isn't a Spike Jonze, but it is one of my all time favorites:
I want to marry that Singing in the Rain thing. I heart it.