Jennifer Lopez released her new music video for "Dance Again" last night -- and while the sexy singer takes center stage, it's her boyfriend Casper Smart who's the real star!

J.Lo made it a point to give her real life man a starring role in the video, where they're both seen showing off their incredible bodies while writhing all over each other the entire time.

"The way that you move boy is reason enough, that I love to make love to you baby," Lopez, 42, sings to 24-year-old Casper.

The PDA is strong throughout the clip, which even has them tying each other up with blindfolds at one point.

It was an odd choice to put her relationship out there so public ... hope it lasts!

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