James Berardinelli"Mamma Mia! delivers exactly what one can reasonably expect from it. It's a faithful adaptation of the stage play of the same name but, more importantly, it's a repository for ABBA songs - nearly two dozen in total. Considering that the average running length of each of these songs is between two and three minutes, that means about 2/3 of the film is singing, with the remaining 35 minutes (or so) devoted to insignificant things like exposition and dialogue. Mamma Mia! is relentlessly cheerful and unapologetically campy, and will find its strongest (and perhaps only) adherents among the group that looks back fondly on ABBA..."