Viva la Musica!’s eclectic assembly of volunteer singers flawlessly fuses the choral-orchestral genre with folk songs, gospel, and multicultural numbers. This December, the troupe celebrates its 11th annual holiday concert, reaching deep into its repertoire to dazzle listeners with an aural collage more inspirational than a self-help book penned by a state bird. Director Shulamit Hoffmann leads the spirited squad of singers who, backed by a brass ensemble, traverse musical history, covering hymns from 16th-century Venetian antiphonies all the way up to modern-day genres such as contemporary American jazz. At 3:30 p.m. before the concert starts, Hoffmann will discuss details and historic information on the show's works and musical notes at no additional charge. Adding to the festive airs and flocks of gift-wrapped quarter notes, the performance will also include a rendition of John Rutter’s fiery anthem, Gloria. St. Peter's has free parking.