Actress, singer, and Tony Award winner Kelli O’Hara will perform a benefit concert for Sandy Hook Promise at Provincetown Town Hall, 260 Commercial St., on Sunday, Aug. 15, 6:30 p.m. She will be accompanied by pianist Seth Rudetsky. The concert is part of the Art House’s summer series. Tickets range from $50 to $150 at provincetownarthouse.com.