Katy Perry Attends Part Of Me 3D Film Premiere The 'California Gurls' singer launches her 3D concert movie with a pink carpet event in Hollywood. Katy was joined by a host of stars, including Carly Rae Jepsen and her 91-year-old Grandma. 1. Katy Perry arrives at The Hollywood premiere for her 3D concert film in Los Angeles this week. 2. Katy escorts her 91 year-old grandmother into the theatre for the premiere of Part Of Me 3D. 3. Katy posed for the press in a scarlet dress with matching red heels and lipstick. 4. The 'Teenage Dream' singer arrived on a specially made pink carpet for the star-studded event. 5. Katy greets fans outside the Grauman's Chinese Theatre at the Part Of Me 3D US premiere. 6. The 'Firework' star gives one of her youngest fans a high five to celebrate the occaision. 7. Katy poses with 'Call Me Maybe' star Carly Rae Jepsen at the Hollywood event. 8. Katy Perry was all smiles at the event in celebration of her launching her 3D concert film. 9. Justin Bieber and girlfriend Selena Gomez arrive for the premiere of Katy Perry: Part Of Me 3D. 10. 'Call Me Maybe' star Carly Rae Jepsen wears all blue for the high profile premiere event. 11. The Canadian singer poses next to a poster of Katy Perry after arriving at the Hollywood theater. 12. Katy Perry bursts out of a giant popcorn bag for a surprise performance at the film premiere. 13. The 'Teenage Dream' star surprised the audience in Hollywood as she took to the stage to sing. 14. Katy Perry's performance outfit included a top designed as a pair of film reels. 15. The 'E.T.' singer showed off her legs in pink high heels and high waisted hot pants. 16. The crowd went crazy while Katy sang the film's end-title track 'Wide Awake'. 17. Katy perches on top of her back-up dancers while singing live for the crowded Hollywood audience. 18. Katy's surprise performance saw her take to the stage outside Grauman's Chinese Theatre in Hollywood 19. Katy performs alongside brightly coloured backing dancers at the premiere of Part Of Me 3D. 20. Katy Perry's stage outfit featured a skirt designed to look like a bag of cinema popcorn.