Pentatonix is a Mind-Blowing Display of A Capella

Many argue that Pentatonix has brought the wonderful world of a capella to the forefront of pop culture. After forming in 2011, the widely loved a capella quintet rose to prominence after winning the third season of NBC’s The Sing-Off. Since rising to fame, Pentatonix has racked up three Grammy’s, released several hit albums and earned billions of views…