Oh 'Mamma Mia,' you're showing your age
THEATER REVIEW: "Mamma Mia!" at the Oriental Theatre ★★½ THEATER REVIEW: "Mamma Mia!" at the Oriental Theatre ★★½ ... It will be 13 years in April ¿ oh, the horror of it! ¿ since I first sat in the back of London's Prince Edward Theatre and watched this brilliantly clever confection basically define a new kind of populist musical.