Watch the news coverage of 'Katy Perry: Part of Me 3D' red carpet premiere in Hollywood. Katy even brought some of her friends, including Justin Bieber, Selena Gomez, Victoria Justice, and many more.
Katy Perry: Part of Me 3D is a backstage pass, front row seat and intimate look at the fun, glamorous, heartbreaking, inspiring, crazy, magical, passionate, and honest mad diary of Katy. (Official Description)