Stage review: Take a chance on irresistible 'Mamma Mia!'

Pittsburgh Post-Gazette: There are few sure things as sure as "Mamma Mia!"
The jukebox musical laced with songs by the 1970s Swedish pop sensation ABBA has been on Broadway since 2001 and remains steady as she goes on tour. The show is docked here for a sixth time and earned a "Wow, Pittsburgh!" from the Heinz Hall stage during the exuberant encore on opening night.
In my first foray with the stage musical -- I know, right? -- I intended to be a hard sell. But in the end, I, too, surrendered to the charms of "Mamma Mia!"
Now I can't get "Waterloo" out of my head.