Celebrity News July 26, 2015 Sheer Perfection: J.Lo Turns 46 in Sexy Style, with Casper at Her Side! Always known for pushing the fashion envelope, Jennifer Lopez may have just outdone herself at her 46th birthday bash at 1OAK in Southampton. Booty-ful dress, J.Lo! [Cred: Jerritt Clark/Getty Images] The dazzling diva hit the party, where guests enjoyed gluten-free summer cocktails by CÎROC Vodka, in a black cutout dress with sheer side panels that showed off every inch of her enviable body. Casper to the rescue [Cred: 1OAK] The ageless idol arrived with on-again-off-again love Casper Smart, who Us magazine reports shielded her from over-the-top picture-taking by starstruck guests. J.Lo danced and partied all night! [Cred: Jerritt Clark/Getty Images] Jennifer was toasted by her mentor, Benny Medina. No word on any presents she received, but if you've got a body like that at 46, would bath salts really rock your world? #CasperSmart #JenniferLopez More Jennifer Lopez Flashes Sexy Side Booty in NYC ‘Hero’ Jennifer Lopez Honored at Radio Disney Music Awards, Plus More Red Carpet Moments! Casper Smart Opens Up About His Relationship with Jennifer Lopez Jennifer Lopez on Her New Comedy, 'Mothers I'd Like To...'