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Jennifer Lopez has a message to women out there: It doesn’t matter what age you are, you can still look and feel sexy.

The singer-actress celebrated her birthday in a star-studded party this weekend and she looked better – and younger – than ever.

Donning a cut-out sheer black dress by L.A.-based designer Bao Tranchi, Lopez hosted the festivities at 1OAK in Southampton, N.Y. and was joined by the likes of Thalia, French Montana, Natasha Bedingfield and rapper Fat Joe. Her longtime manager Benny Medina paid a special tribute to the singer while she hung out with on-again-off-again boyfriend Casper Smart.

"She was dancing all night, and she looked amazing," a source told Us Weekly. “He had his arm around her, and they were tight all night.”

Lopez’s sexy dress got the attention of curve queen Kim Kardashian, who could only swoon of the singer’s attire on social media.

"Damn!!!!! How hot does @jlo look!!!!! She will forever be my idol!!!!#BodyGoals," Kardashian captioned a picture on Twitter.

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