Bare Rhythm is Calabasas High School's premiere upper voiced a cappella ensemble. The group is led by CHS Vocal Music Director, Michael Siegel, and Voice and Performance Coach, Alana Weiss, with coaching by singer/songwriter and CHS A Cappella alum, Mateo Gonzales.

Founded in 2004, Bare Rhythm has provided students with a platform to hone their craft, perform, record, and build a community of like-minded musicians committed to artistic growth. Among the group’s accomplishments include being two-time featured performers at Deke Sharon's "Total Vocal" concert at Carnegie Hall in New York, traveling to China for a 19 day, 5 city performance tour and performing in a Cover Girl campaign. Bare Rhythm boasts many alumni who have gone on to study and perform music at prestigious universities and in some of the top a cappella groups in the country, as well as singers who have created successful contemporary music, stage, film and television careers.