Jennifer Lopez Has Never Looked Better In a Bikini

At age 45, Jennifer Lopez can still share a bikini pic and make women half her age jealous of her flawless physique.

J.Lo shared a sexy Instagram image on Tuesday of her posed wearing nothing but a teeny bikini, a belly chain and a few more simple accessories. While she looks hot, her caption reveals that she was a bit cold during this photo shoot. "Soooo chilly this morning," she writes. "I want summer back. #sunnydays #warmnights #tanskin #hangingbythepool #julybaby #LEO #Ilovesummer."

PHOTOS: 40-Something or 30-Something? Guess Jennifer Lopez's Age In These Pics

Lopez has really taken her sexiness up a notch this year, between her ab-tastic outfits and her sexy "Booty" music video with Iggy Azalea.

PHOTOS: Hollywood's Hottest Bikini Bods

Earlier this month, J.Lo addressed the critics who sometimes say she's overly provocative. "I refuse to be put in a box in that way," Lopez told ET. "Why, because I'm over 40? So I can't be sexy? Or, is it because I'm a mom? Moms aren't allowed to be sexy. Uh, how did I get my kids in the first place?"