Pentatonix Master Class ASU - Building "Show You How to Love"

Pentatonix Master Class at ASU West on 9/21/12. Building Show You How to Love part by part. Pentatonix perform Show You How to Love at the ASU West Pentatonix master class on 9/21/2012 in Phoenix, Arizona. The Pentatonix's won season three of NBC's TV show "The Sing Off"