Ploughshare Poets, a Celtic band, will perform to benefit the Lighthouse Foundation of Middlesex Township at 7:30 p.m. Saturday at From the Hand Galleries, 119 W. New Castle St. Cost of the evening of traditional and nontraditional Celtic tunes is $5 or five nonperishable food items. Gourmet cupcakes will be available for purchase, also to benefit the Lighthouse. Call 724-968-6613.

Classic country singer Tony Barge will perform from 7 to 10 p.m. Saturday at the East Butler Fireman’s Club on Grant Avenue. Call 724-761-6440.

REGIONAllegheny RiverStone Center for the Arts in Foxburg will host an Irish music concert at 7 p.m. March 16 in Lincoln Hall on Palmer Street, with tickets at $10 for adults and $5 for students. To reserve tickets, call 412-867-1816. Any available tickets will be sold at the door.

PITTSBURGHMusic in a Great Space, the concert series at Shadyside Presbyterian Church, 5121 Westminster Place, presents organist Mark Anderson in concert at 4 p.m. Sunday. Tickets are $10 for adults, $5 for senior citizens, and free for students and children. Proceeds benefit the missions of Shadyside Presbyterian Church. Call 412-682-4300 or visit www.shadysidepres.org.

Pittsburgh Opera presents opera stars concerts by Angela Brown at 6 p.m. today and by Paolo Pecchioli at 6 p.m. April 14, both at the George R. White Studio at Pittsburgh Opera’s headquarters, 2425 Liberty Ave. Tickets are $50 per concert. Call 412-281-0912, Ext. 225, or visit the website www.pitts burghopera.org.