Jennifer Lopez's ex-boyfriend Casper Smart has sent some super sweet "Happy Birthday" messages to his previous girlfriend!

The "I Luh Ya Papi" singer turned 45 years old yesterday (July 24), and her dancer ex was quick to congratulate J-Lo on her birthday on Twitter and Instagram.

"Happppppppy Birthday to the most Beautiful lil bear in the world!!!! May all your wishes come true!! @JLo," wrote Casper Smart on his Instagram and Twitter post. But J-Lo's ex-boyfriend didn't end the message there - the post was accompanied by a snap of a cute cake in the shape of a pink bear wearing a bow.

Jennifer Lopez hasn't replied to Casper Smart on Twitter - from the looks of her Instagram posts, it seems like the star is too busy partying to reply to her ex-boyfriend just yet!

The singer has recently been on vacation with bestie Leah Remini, and it really does look like the fun hasn't ended.

J-Lo posted a snap of herself in a bathtub with petals as the start of her birthday uploads, with the caption "Soaking it all in... #birthdaygirl #itsmyparty #quietbeforethestorm".

Shortly after, the birthday girl posted a photo of herself illuminated by a purple, pink and blue light.

"Let the games begin! #itsmyparty #funtimes #birthdaygirl #aintnuthingbutanumber," said Jennifer Lopez.

Another post came after - a cute selfie with J-Lo commenting "Thelma and Louise. Lol! Love my girls!"

The star has posted a bunch of peeks into her life recently on social media, particularly from her vacation with best friend Leah Remini. In one of her most recent videos, Jennifer Lopez and Leah filmed themselves in the car with their kids in the back seat. The pair bopped their heads while Leah sang and dared J-Lo to go horseback riding - we still don't know if she did it!