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"Katy Perry has unveiled the first trailer for her forthcoming concert movie. The singer&amp;#039;s documentary film Part of Me 3D will open in US cinemas on July 3 and follows the star across the globe during her &amp;#039;California Dreams&amp;#039; tour.   &amp;quot;The atmosphere I grew up in was 100% Christian,&amp;quot; Perry reveals in the trailer. &amp;quot;I started singing in church and I never really had another plan.&amp;quot; The clip then shows footage from her numerous music videos, as well as scenes from her world tour.   Perry first confirmed the release of Part of Me 3D last month, with reports saying Paramount planned to base the film on the same model used for Justin Bieber&amp;#039;s Never Say Never. The performer&amp;#039;s latest single - also titled &amp;#039;Part of Me&amp;#039; - reached number one on both the UK and US charts upon its release earlier this year. &amp;gt; Katy Perry: &amp;#039;I have an idea what my next two albums will be about&amp;#039; Watch the official trailer for Katy Perry&amp;#039;s Part of Me 3D below:      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/music/news/a374452/katy-perry-debuts-part-of-me-3d-concert-movie-trailer-watch/>