EXCLUSIVE PHOTOS: Katy Perry Wears Cake In Her Hair - And Likes It!

Katy Perry drew a star-studded young Hollywood crowd - everyone from Selena Gomez to Lindsay and Ali Lohan - for her show at the legendary Hollywood Palladium Saturday night but the real fun came afterwards.

The I Kissed s Girl girl and her entourage took over the hot new nightspot H-Wood for a raucous party that ended with Katy wearing her celebratory cake home.

Click Here For More Photos

Katy's been on a world tour for what seems like forever, but with just one more show to go, we expect to see a lot more of her on the Hollywood club scene.