"Three-time Grammy® Award-winning and multi-platinum-selling artist Pentatonix...formed in 2011 during NBC's The Sing Off. Now signed to RCA Records, Pentatonix has sold more than 10 million albums worldwide, which includes two #1 albums on Billboard's Top 200 Chart - 2015's gold-certified self-titled album and the 2x platinum That's Christmas To Me." - Taken from artist's website.
