Kristen Stewart chats with her friends at Katy Perry‘s birthday party held at The Magic Castle on Friday (October 19) in Los Angeles.
The 22-year-old actress attended the bash with her boyfriend Robert Pattinson‘s pal Marcus Foster.
“She looked happy and was surrounded by her friends the whole time,” a source told JustJared.com of Kristen‘s night out without Rob, who is close friends with the birthday girl.
Katy celebrated her 28th birthday that evening with a costume party. She dressed up as a vampire while her boyfriend John Mayer dressed as zombie hunter!
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