If the 3-D documentary "Katy Perry: Part of Me" can be trusted, the record-setting pop star is not just a blue-haired doll-person, but also a goofy, sweet and spacey-yet-savvy singer whose main concern is turning average people into candy-coated smile flowers.

As a piece of pro-Perry propaganda, the entertaining and disarmingly poignant movie from directors and reality television vets Dan Cutforth and Jane Lipsitz is a startling success. Although there are moments when the filmmakers' fingerprints are nearly visible on the manipulated putty of an audience, the scenes aren't enough to break the fruit-flavored spell.

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