Katy Perry says her 3-D concert movie will inspire people to "look for the dream."

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STORY: "Katy Perry: Part of Me," a 3-D concert documentary billed as an on-and-off stage close up look at Katy Perry and her 2011 California Dreams Tour, premiered in Los Angeles on Tuesday (June 26). The singer performed a set of her hit songs including new single "Part of Me," to thousands of screaming fans on Hollywood Boulevard prior to the film's screening.