October 20, 2016  

Katy Perry Celebrates Birthday in Costume Party With John Mayer

October 22, 2012 (6:27 am) GMT
Katy channels her inner vampire at the Magic Castle, while John dresses up as the undead hunter wearing a bullet belt across his shoulder.

threw an early birthday party on Friday, October 19 in Los Angeles. The West Coast pop singer, who will turn 28 on October 25, was joined by her rocker boyfriend, , as she hosted a star-studded costume party at the famed Magic Castle.

Katy dressed up as a sexy blood sucker in a white lace sheer dress. She finished off her vampiric look with fake fangs, a necklace with a giant cross, red-tinted nail polish, and a crown. Her beau wore a bullet belt and rocked a prosthetic nose and chin as the undead hunter.

The guests included and . The " Saga" actress attended the bash with 's friend Marcus Foster, while the "" actor was accompanied by his partner David Burtka.

K-Stew opted for a casual number, while Neil dressed up as a vampire. "Thank you @KatyPerry for having @DavidBurtka and me at your frightfully fun B'day Bash at the @MagicCastle last night," the Barney depicter tweeted along with a picture from the party.

Earlier this month, John celebrated his 35th birthday with Katy in a more low-key outing. The "Your Body Is a Wonderland" hitmaker took his girlfriend, his family and some of his close friends to the Freemans restaurant on Manhattan's Lower East Side for a dinner.

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