Singer, songwriter, producer, educator, and all-round entrepreneur Peter Hollens is a champion of a cappella singing dating back to his days at the University of Oregon, where he founded the college a cappella group On the Rocks in 1999 with Leo da Silva. Known initially for his work on YouTube as an a cappella cover artist, Hollens released a pair of debut cover albums in 2012, and eventually inked a deal with Sony, which released his eponymous major-label debut in 2014. Subsequent offerings saw Hollens tackle film and holiday music, and in 2017 he made his Broadway debut alo...