Christina Aguilera's ‘Clockwork' Birthday

Christina Aguilera turned 28 like “Clockwork” on Thursday.

The pop star celebrated her birthday with a party themed after Stanley Kubrick’s film “A Clockwork Orange,” dressed as villain Alex Delarge with a black top hat, a cane and a single blue-shadowed eye.

VIEW THE PHOTOS: Christina Aguilera

Husband Jordan Bratman wore a matching outfit for the event, a dinner at Food Network star Mario Batali’s Osteria Mozza in Hollywood.

The couple was joined by another famous twosome, Nicole Richie – who wore yellow — and boyfriend Joel Madden, as well as Paris Hilton, dressed in black.

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It seems that Christina hasn’t lost her edge since giving birth to son Max in January, but she told Access Hollywood earlier in December that nights out now have something missing.

“It’s fun to be a mommy and tonight it was a little hard to leave my little man,” she told Access at the Grammy Awards nominations concert, where she performed the jazz standard “I Loves You, Porgy.”

And, she said, he doesn’t like seeing her go, either.

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“He puts his arms up and everything,” she said. “But he’ll be able to watch Mommy later and see that it’s Mommy working.”

Related Content from AccessHollywood.com:
PLAY IT NOW: Celebrity Birthdays: December 18, 2008
PLAY IT NOW: Christina Aguilera Talks ‘Keeps Gettin’ Better - A Decade Of Hits’

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