There are numerous opportunities to sing at the BB&N Upper School. Ensembles include the introductory 9th Grade Chorus, the close harmony a cappella groups – The Knightingales and the Voices of the Knight, and the upper level, 45-member Chorale. BB&N singing groups perform two major concerts a year in the acoustically resonant Grace Episcopal Church, Newton as well as at local festivals and school admissions and alumni functions. Over the past 20 years, the BB&N Chorale has embarked upon seven International tours, performing in cathedrals, schools, town squares and festivals across Europe- in countries such as Italy, Slovenia, England, Spain, Austria, Hungary, Sweden, and Iceland. Repertoire spans the classical spectrum- from Renaissance madrigals to contemporary choral works- and also includes spirituals, gospel, and non-European traditions such as folk and ethnic music from Asia, the Caribbean, South America, and Africa.

The musical theater tradition is also strong at BB&N, with the main stage winter production dedicated to a musical as well as a festive annual fall “Cabaret Night” featuring students, faculty and alumni.