The US Premiere of Katy Perry: Part of Me 3D starring the pop princess, was attended by Justin Bieber, Selena Gomez, Twilight hottie Robert Pattinson and others. To know more details, check out the video. Regular Facebook Updates http://www.facebook.com/RajshriDotCom. Twitter Updates https://twitter.com/#!/RajshriDotCom. Follow us on google plus: https://plus.google.com/u/1/b/103548761017638276790/ . Watch more http://www.youtube.com/HollywoodNOW for the latest Hollywood News