0bd1c46b-0c91-4bd0-b67b-3a94c75b40cd 35a0b3dc-7142-48d3-922e-80ceb388d085 Peter James Hollens (born March 4, 1982) is an American singer/songwriter, producer and entrepreneur. He has been involved with a cappella music since 1999 when he and Leo da Silva founded the University of Oregon's a cappella group, On The Rocks, known as the first official collegiate a cappella group in Oregon. He regularly releases new music videos to his YouTube channel. With over 5 million followers and subscribers, his content has received over a billion total views since 2011. 8/9/2013