Some nights, I stay up cashing in my bad luck Some nights, I call it a draw All sounds you're about to hear are made only with the voice and mouth, Peter Hollens has been singing acappella since 1999 when he founded the male a cappella group @ the University of Oregon. His wife founded the female acappella group, which later became the premise to the movie Pitch Perfect, and Mickey Rapkin whom wrote the book interviewed them both numerous times, and Evynne Hollens is the first name on page one o