Hearing Pink Floyd performed by orchestras or in planetariums is nothing new. But you don't always get Zebra frontman Randy Jackson sitting in. The Louisiana Philharmonic Orchestra backs him on classics from Dark Side of the Moon, Wish You Were Here and other albums. There's a meet and greet with Jackson after the performance (8 p.m. Saturday, May 15; www.lpomusic.com) at the Mahalia Jackson Theater. Tickets $20-$125.