, J.Lo!

Jennifer Lopez took to Instagram on Wednesday to share the cover art for her new single -- and she's looking HOT.

In the pic, the 45-year-old beauty shows off her signature booty in a black and white leotard with a deep plunging back. 

"#bootyfromtheblock #bootyandthebeat #naturalbooty #bootybootybootybootybootyeverywhere #jlobooty #LOL," she captioned the sultry snapshot.

The singer recently released a teaser for her "Booty" music video, where she shows off her famous derriere in skin-tight leggings, while twerking and popping her backside with some super sexy dance moves.

Check out the teaser below!

So, how does Jennifer maintain that enviable bod?

Lopez keeps her glow (even with 16-hour workdays) with a few healthy habits: following a sugar-and salt-free diet, nixing cigarettes and alcohol, and getting eight hours of sleep a night.

Her plan is clearly paying off -- she looks better than ever!

Click "Launch Gallery" above to see more pop stars, then and now. 

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