This week, American pop singer Peter Hollens had possibly the best week of his career. Although he already had a very impressive following and fan base, one of his videos went viral and propelled him ...

One-man a cappella vocalist and video producer Peter Hollens has been releasing videos on YouTube for over three years to overwhelming feedback. His videos have over 71 million views and his YouTube ...

NPR's Audie Cornish talks with Peter Hollens, an a cappella singer who regularly releases new music on his YouTube channel, about how the proliferation of music online could be a plus for artists.