Peter Hollens is an American pop singer-songwriter-producer. He has been heavily involved with a cappella music since 1999 when he co-founded (with Leo da Silva) the University of Oregon's award-winning a cappella group On The Rocks, known as the first official collegiate a cappella group in Oregon. On The Rocks began a tradition of excellence in a genre that was previously unheard of in the Northwest. Originally from Ashland, Oregon, Peter graduated from the University of Oregon with a Bachelor of Music in Vocal Performance. Since his graduation from the U of O, he has become very involved with collegiate a cappella, including recording, producing & judging international a cappella competitions throughout the United States.

In 2010, Peter was featured on NBC’s The Sing Off season 2 receiving acclaim from The Sing-Off judges Shawn Stockman, Nicole Scherzinger and Ben Folds for solo performances leading On the Rocks, one of America’s premier collegiate a cappella groups. Peter records and produces from his home studio in Eugene, Oregon and recently recorded for Sony and Epic Records. Peter is married to Evynne Hollens, founder of the a cappella group Divisi.