Jennifer Lopez Bares Cleavage at Beau Casper Smart’s Birthday Dinner (PHOTOS)

at 8:02 pm | By

JLo Bikinis in Brazil
Jennifer Lopez hits the beach with Casper Smart.
Just days after premiering her super sexy music video with boyfriend Casper Smart, Jennifer Lopez was seen ringing in her “Dance Again” costar’s birthday at Cecconi’s in West Hollywood. Sporting a turquoise, cleavage-baring Michael Kors dress, Jennifer was all smiles as she celebrated her beau’s big 2-5 with manager Benny Medina and fellow American Idol judge Randy Jackson.

Unable to contain her excitement, JLo showed her boy some love on Twitter:

But Jennifer did more than just give her boy birthday shout out — the 42-year-old singer also splurged big on Casper by surprising him with a new car!

“Yes, she did buy him a white pickup,” a source told E! Online. “He really wanted one and she surprised him. He had no idea he was getting it.”

It looks like Casper had one heck of a birthday! Check out Casper’s new truck — and more extravagant celebrity gifts — below.