media_removed_toofab 102011

Casper Smart
celebrated his birthday this weekend in L.A. -- where girlfriend Jennifer Lopez gave him a really BIG present!

The couple was seen at Cecconi's on Friday night, where J.Lo rented out the restaurant's Butterfly room for a private party reportedly attended by Reggie Bush and Randy Jackson.

"@BEAUcasperSMART 'Beau has a birthday we're so glad we hope its the happiest Birthday Beau ever has!' HAPPY BIRTHDAY BEAR!!!," Jennifer tweeted before the soiree.

Lopez, 42, and Smart, 25, pulled up to the party in J.Lo's b-day present for him: A new Dodge Ram pickup truck!

Jenny looked great for her man too, wearing a slim-fitting, turquoise Michael Kors dress.

Check out they couple leaving the event above -- and the video below.

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