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Members of the Polyphonic Spree never intended, despite their matching white choral robes and choreographed dance moves, to resemble a cult, like the identically dressed adherents of Heaven’s Gate. The group’s mission was to create orchestral arrangements reminiscent of the Beach Boys and Beatles that featured vocals inspired by Ozzy Osbourne and hope that from that mix, an audience would grow. The Spree developed a devoted following after its joyful “Light & Day/Reach for the Sun” was featured in several commercials, and for the past fifteen years, the group has toured the nation with several dozen members and jangle-pop songs in tow. When the Spree plays the Birchmere, 15 to 20 members will perform the group’s first album, The Beginning Stages of…, in its entirety. Since that album only runs about 30 minutes, expect the band to perform some old favorites and a few covers as well. Founder Tim DeLaughter is a big fan of Wings, so perhaps now’s the time to memorize the lyrics to “Band on the Run.” The Polyphonic Spree performs with Telegraph Canyon at 7:30 p.m. at the Birchmere, 3701 Mount Vernon Ave., Alexandria. $35. (703) 549-7500. birchmere.com.