Starting from the year 1100 up through 2013, watch the Pentatonix pay tribute to some of the biggest songs in history with the "Evolution of Music"!

 

These guys are becoming insanely popular!  I first became aware of them with their cover of Lorde's "Royals."  Recently, I also shared their tribute to Beyoncé (click either one to see them).  Check out this really cool video of the Pentatonix's "Evolution of Music"!