Pentatonix: Everything You Need To Know About The World’s Biggest A Cappella Act

Sing-On! Pentatonix has gone from record label reject to mainstream success in just a few years. (Photo by Theo Wargo/Getty Images).

The five members of Pentatonix–Scott Hoying, Kevin Olusola, Kirstin Maldonado, Mitch Grassi and Avi Kaplan–became the first a cappella act to make it to our 30 Under 30 list, but it hasn’t been an easy road.

After winning The Sing-Off in 2011, the group got a $200,000 record deal–and was quickly dropped. So they turned to YouTube, where their pop-rock covers hav...