Contestants on NBC’s The Sing-Off, The Backbeats and Street Corner Symphony deliver a rousing evening of electrifying vocals and commanding music. Opening the show is The Backbeats, who shook up the a capella scene with its engaging singing, luscious harmonies, and impressive vocal percussion. A Nashville-based a cappella outfit and The Sing-Off runner-up, Street Corner Symphony charms with a unique, laid-back Southern Soul and Gospel sound.
