CAN YOU GUESS THIS SONG?

http://www.youtube.com/watch?v=LbkNxYaULBw

Man, this guy has a lot of free time on his hands but this video is quite impressive. If you're slow like me, the song will have sounded familiar the entire time but you just couldn't place your finger on what the song was. Apparently, for the average viewer, the song should become recognizable somewhere around in the middle.

So, can you guess the song? :)