"Mamma Mia!"

Ah, summertime: That sunny, carefree three-month window during which, ideally, we're supposed to be having fun at the movies -- and if we're not, we need to be beaten into believing we're having it. I don't normally think of Meryl Streep as the dominatrix type, but watching her and her two BFFs, played by Christine Baranski and Julie Walters, grinning and giggling their way through "Mamma Mia!" I… » Full Story on Salon.com