The Song from the end of Portal Game

I played this game over the weekend. It's short, sweet, and very fun. It's worth the $10 it costs at Target. But for 2 days now I've had the creepy song at the end stuck in my head. So I made a recording so I can listen to it over and over...that's the only way I have found to get a song out of my head is to learn the words. Otherwise my brain keeps looping through trying to "figure out" the lyrics. Watch it below...