Peter Hollens is an American independent 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. Peter Hollens is an American independent 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. false 2025-02-02 10:09:51 46 Country Pop 128176 7b0fbeae-b6e1-4960-8acd-7fb1fa9743e7 /media/data/media4/Music/Peter Hollens/folder.jpg /media/data/media4/Music/Peter Hollens/backdrop.jpg /media/data/media4/Music/Peter Hollens/fanart.jpg 2016 2022 Peter Hollens