Katy said, "I never thought I'd shut down Hollywood Boulevard. I told them I wanted to do something special. I hope this is special enough."
Watch some of Katy's concert in the videos below--she performed I Kissed a Girl, Teenage Dream, Firework, Part of Me, California Gurls, Last Friday Night (T.G.I.F.) and Wide Awake.
Celebs were in full force at Katy's premiere, including a Selena Gomez and Justin Bieber sighting--so cute!
Katy wore a red velvet Dolce & Gabbana dress, noting that it was like taking the red ropes of Hollywood and making them into a dress.
Of course, she switched things up for her performance, with movie reels incorporated into the top of her costume and a movie theater popcorn skirt, which she ripped off to reveal a movie snack patterned high waisted number!