The name Sweet Honey in the Rock comes from a song based on Psalms 81:16, which tells of a land so rich that when rocks were cracked open, honey flowed from them. Appropriate, then, that the singing group that shares that name features such stunning, complex vocal harmonies. The African American all-female vocal harmony group Sweet Honey in the Rock, set to perform a holiday concert at 8 p.m Saturday, Dec. 5, at the Collins Center for the Arts in Orono, have for the past three decades recorded traditional, contemporary and children’s music. Their music comes out of the black vocal tradition, with its roots in the church and the civil rights movement, and has appeared on several Grammy Award-winning compilations. Sweet Honey has performed all over the world, from every state in the U.S. to China and parts of Asia, and just this year performed at the White House. While current members are Ysaye Maria Barnwell, Nitanju Bolade Casel, Aisha Kahlil, Carol Maillard, Louise Robinson and Shirley Childress Saxton, more than 20 other singers have come in and out of the group, founded in 1973. For its Orono performance, the group will sing holiday songs from many traditions. It’s a unique opportunity to get your holiday season warmed up. Tickets are $37 and are available by calling the Collins Center for the Arts box office at 800-622-TIXX.