World music choral ensemble The Halalisa Singers present Stars of Wonder, a concert of contemporary choral classics for the holiday season, on Saturday, December 3, 8 pm, at First Parish Church, 7 Harrington Road, Lexington and Sunday December 4, 3 pm, at First Parish Church, 327 Concord Road, Sudbury. The ensemble is led by First Parish Member and Artistic Director Mary Cunningham and accompanied by Trevor Berens, piano.