First we had the evolution of dance, now make way for the Evolution of music. This is one group's representation of almost 1000 years of music.

We have featured this acapella group before.  This is Pentatonix or PTX for short. I must admit that ever since I saw the movie pitch perfect I have been fascinated by acapella songs and this one is really cool. What a huge span of time to cover and I think they did a pretty awesome job.