Gangnam Style passed 1 billion views today. YouTube even made a special gif for it, dancing next to the view counter. (For some reason, it won't let me insert the gif into the post, so you'll have to go to the video and hope it's still there.) That's about one view for every seven people on earth. I mean, obviously it's not exactly that, because it's been more often seen by the same people over and over again than it's been seen by new people, but still.
To celebrate, here's a link and an embed to the most popular song on the internet: