With all the giddy, giggly energy of a ten-year-old girl’s slumber party (and roughly the same aesthetic self-discipline), Mamma Mia! practically dares you to criticize it, only to laugh in your face. From the breathless opening, in which bride-to-be Sophie (Seyfried, as cheery and full-throated as anyone from High School Musical) sends wedding invitations to each of the three men who might be her father, the cast jumps around a gorgeous Greek island, bursting into some of the most hooky pop songs ever written. This movie isn’t just unapologetic fluff; it’s aggressive, out-loud-and-proud fluff. Just like Abba. The DVD includes a sing-along lyrics option, a deleted musical number and a commentary track from Lloyd. The two-disc set ($34.98) also has several making-of featurettes.