It looks like Jennifer Lopez and Casper Smart are friends, but just without the benefits. Even though they've denied rumors that they are dating again, the ex-couple were spotted getting very up close and personal while celebrating Smart's birthday in Las Vegas this past weekend.

According to People Magazine on Sunday, Lopez and Smart were caught getting "cozy" with each other at MGM Grand's Hakkasan Las Vegas Restaurant and Nightclub on Friday.

A source said that Lopez was in "good spirits" and even posed for a few pictues with fans while she was out with Smart.

Meanwhile, there was even a report that past week that suggested the former lovers might have "faked" their relationship for the sake of their careers.

According to TMZ, Lopez and Smart broke up to help benefit their careers. Producers supposedly thought it would be a good idea if Lopez promoted her latest film The Boy Next Door as a single woman while Smart was "more appealing single" for his big screen film Street.

TMZ reported, "Jennifer Lopez and Casper Smart did NOT get back together, because we found out they were never really apart. Sources close to the couple tell us ... the break-up they announced in June was a business move. Multiple sources say in the spring they did stop seeing each other, but only for a few weeks."

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Jennifer Lopez, Casper Smart