Movie review: 'Katy Perry: Part of me'

There's a lot of typical concert footage and interviews in Katy Perry's tour doc, which details her rise from Pentecostal childhood to teen gospel singer to behemoth touring machine with pinwheels on her boobs. But there is more: During her "California Dreams" tour, Perry also was juggling a marriage (to Russell Brand) that would fall apart while she was on the road. The cameras are there not only when Perry's on top of the world, but also while she's sobbing right before taking the stage in Brazil. It's heartbreaking to watch. For Katy Perry, the show must (and does) go on. (Rated PG.) - KARA NESVIG