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After a long day on the set of her latest film The Back-Up Plan, Jennifer Lopez was surprised by the cast and crew with an impromptu birthday celebration. Lopez was presented a big cake and her co-star Alex O’Loughlin made a toast. “Happy birthday. Welcome back, baby! To Jennifer!” he says, holding up a bottle of champagne. 

However the partying wasn’t over for Jennifer. She was treated to a surprise party by part Dolphin’s owner and husband Marc Anthony. The party took place at the Hotel Griffou in Greenwich Village, New York. The mother-of-two looked stunning in a silver gown and statement diamond earrings. The figure-hugging fabric made the most of her enviable body, while the shimmering shade set off her tan.

When I turn 40, give me Jennifer’s body. Not the children eating Megan Fox one though.

Gallery Info: Jennifer Lopez’s 40th birthday dinner