Their fourth album, "PTX Vol․ III," debuted at No․ 5 on the Billboard Top 200 in September 2014
Won a YouTube Music Award for their collaboration on Imagine Dragons' "Radioactive" with Lindsey Stirling at the inaugural ceremony in 2013
Won the third season of NBC series "The Sing-Off" in 2011
Formed in 2011 by Kirstie Maldonado, Mitch Grassi and Scott Hoying, who met at their high school in Arlington, Texas
Members of the group include Kirstie Maldonado, Scott Hoying, Mitch Grassi, Avi Kaplan and Kevin "K․O․" Olusola
Five-person a cappella group whose reinterpretations of pop songs, including a Daft Punk mash-up, have made them popular on YouTube
In addition to a Daft Punk mash-up, their most popular videos are "Evolution of Music," a 36-song vocal journey through the history of music, and a collaboration with violinist Lindsey Stirling on a cover of Imagine Dragon's "Radioactive․"