Jennifer Lopez's Birthday: A Party With Gal Pals & Best Wishes From Ex Casper Smart

Jennifer Lopez celebrated her birthday on Thursday, the star turned 45, and it included some birthday love from ex-boyfriend Casper Smart.

"Happppppppy Birthday to the most Beautiful lil bear in the world!!!!" Casper wrote on Instagram with a photo of a bear-shaped cake.

"May all your wishes come true!! @JLo.," the backup dancer continued in the post.

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J.Lo responded to her ex on Twitter, writing, "@BEAUcasperSMART Thank you so much for my birthday wishes."

As for the star's celebration, it appeared to be all her best girls.

The birthday girl was busy on Instagram on Thursday, sharing photos of her birthday, including a sexy shot of herself soaking in a bathtub filled with flower petals.

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"Soaking it all in... #birthdaygirl #itsmyparty #quietbeforethestorm," she wrote in the caption.

She also posted a sultry evening selfie, presumably at her party, where she embraced hitting 45.

"Let the games begin! #itsmyparty #funtimes #birthdaygirl #aintnuthingbutanumber," she wrote in the photo caption.

-- Jesse Spero

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