I've mentioned before how much I like "The Elephant Song" by Eric Herman. Very simple, a catchy melody, and an idea almost infinitely adaptable to whatever you want to sing about. ("Trucks, I love trucks, I love the way they zoom high through the clouds..." "The Diamondbacks, I love the Diamondbacks, I love the way they have a really high team batting average...")
Anyway, it's been around for awhile, but the song's video (animated by Eric's wife Roseann) hit the big time this week -- YouTube's front page.
It's the best hand-animated video since A-ha's "Take On Me," though its chunky computer animation is more "Money For Nothing," I suppose.