For the 11th consecutive year, Napa High School’s a cappella group, Vocal Music Workshop, is proud to host the ever popular, high energy concert, the “A Capella Extravaganza!” This concert boasts a one-of-a-kind lineup of high school and collegiate professional groups. Headlining this year’s concert are NBC’s The Sing-Off favorites, The Exchange. With these vocal powerhouses, every show is half concert, half house party.