THEATER/FILM/COMEDY Pittsburgh Ballet Theatre’s features upcoming performances: “Beauty and the Beast” from Feb. 16-25; “Spring Mix” from April 5-7; and “Cinderella” from May 17-19, all at the Benedum Center. For tickets, times and additional information, visit pbt.org. “Mamma Mia!,” the musical based on the songs of ABBA, comes to the Benedum Center in Pittsburgh March […]