The Infinite Jukebox will analyze your favorite song, cut it up, and piece it back together in a seemingly seamless infinite loop. The goal is for you to never realize the song jumped from part to part, essentially remapping the song for it to last forever.
Curious? Of course! Take a look.
Here is that uber popular song Call Me Maybe:
Try out a few other songs here: http://labs.echonest.com/Uploader/index.html