Demi Lavato and Rebecca Black @ Katy Perry L.A. 'California Dreams Tour' Concert - Aug 5

Singer and actress Demi Lovato enjoys an evening out at the Katy Perry concert at Nokia Theater in Los Angeles with some friends.

Rebecca Black is seen leaving the Nokia Theater in Los Angeles after performing with Katy Perry in her "California Dreams World Tour 2011".

Katy Perry @ L.A. "California Dreams" Tour Performance - Aug 5

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Vanessa Hudgens Stylish Hair + Katy Perry's Pink Hair

Vanessa Hudgens styles her new haircut and wears a short leopard-print dress out and about in Los Angeles, California on August 1, 2011.

Josh Hartnett And Sophia Lie Strolling in NYC + Katy Perry and Russell Brand- July 1

Katy Perry and Russell Brand in West Village - July 1

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