Thursday, Dec. 20

7:30 p.m. concert at the Opera House at Boothbay Harbor. The classical-crossover quartet was a finalist on America’s Got Talent  with their ethereal and emotionally stirring interpretations of pop music, arranged with a unique blend of vocals, harp, piano, and cello.Notable performances include collaborations with Keith Lockhart and the Boston Pops, the Cincinnati Symphony Orchestra, and Cynthia Erivo.  Advance discounted tickets $30 from the box office: call 207-633-5159 or stop by 86 Townsend Ave. $35 online tickets at https://boothbayoperahouse.com