‘Katy Perry: Part of Me’ is highly successful propaganda

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.

The main thread of the movie follows the “Firework” singer during 2011. It was a particularly eventful year for Perry, who globe-trotted for her sold-out California Dreams Tour and also ended her 14-month marriage to comedian Russell Brand.

Backstage footage shares screen time with concert numbers, old home movies and interviews that chronicle Perry’s relatively slow rise to success.

It’s a compelling story that mixes onstage moments and behind-the-scenes glances, such as Perry’s visit to her grandmother, who is humorously less sugary sweet than her progeny.