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Jennifer Lopez was glued to the dance floor at her 45th birthday party in the Hamptons, New York, last Friday.
The “I Luh Ya Papi” hit-maker spent the duration of her party on the dance floor at Nammos, a Mediterranean restaurant, in New York celebrating her milestone with her friends — including Khloé Kardashian, French Montana, Scott Disick and Rachel Zoe — and family.

A source told PEOPLE.com: “She was so happy and she stayed till 4am. They had a dinner party and there was champagne, and she danced all night long. Everybody was dancing.”

The brunette beauty — who has six-year-old twins Max and Emme with ex-husband Marc Anthony — posted a picture of herself all dressed up for her party on Instagram yesterday evening, which she accompanied with the caption: “’Let the games begin! #itsmyparty #funtimes #birthdaygirl #aintnuthingbutanumber (sic).”

Meanwhile, Jennifer’s ex-boyfriend Casper Smart, whom she split from a few months ago following two years of dating, proved they’re still friends after he sent her a birthday message on Twitter yesterday. The choreographer posted a picture of a pink bear cake, which he had given Jennifer for her 43rd birthday two years ago, and accompanied it with the caption: “Happppppppy Birthday to the most Beautiful lil bear in the world!!!! May all your wishes come true!! @JLo (sic).” — Bangshowbiz