A YouTube sensation with performances at Carnegie Hall, Backtrack is a five-person a cappella group based in New York City that explores the power of the human voice through unique vocal arrangements, tight harmonies, and world-class beatboxing. They infuse heart and humor into every performance and push the limits of a cappella by creating impressive covers of past and present pop music, writing inspiring original compositions, and daring to take on unexpected genres such as classical and electronic music.  Admission $15