This is a very cool video of Walk off the Earth performing a cover of Gotye's "Somebody that I used to know" using five people on one guitar. If you haven't seen it give it a listen. The lovely lady is The Creepshow's Sarah Blackwood.
Also interesting and different is Gotye's original video (if you like artsy videos) and the original song is great, too. Some nice lyrics as well (ex: "You can get addicted to a certain kinda sadness..."). Go to watch it here (if you do, you have to get past the first 30 seconds because at first you might be wondering what sort of video I've sent you to, but don't worry, it's the right video so hang in there).