Here are two very different videos that I saw today and enjoyed immensely.
First, via Ben, Straight No Chaser's Twelve Days of Christmas:
Make it through at least the first two minutes, and I don't think you'll be disappointed with the last minute and a half. At least, if you're nerdy like me.
Second, via Ted, Guns 'n' Roses/Foo Fighters mash-up:
I totally heart Dave Grohl.