Jennifer Lopez Stuns in Sexy, Plunging Swimsuit While Relaxing Poolside in Vegas

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Jennifer Lopez just keeps getting hotter and hotter!

The "Ain't Your Mama" singer took to Instagram on Friday to share a sexy snap of herself relaxing poolside in Las Vegas.

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In the pic, Lopez, 46, shows off her incredible physique in a white Moeva swimsuit, which features a very plunging neckline and gold belt. She completed the ultra-fierce look with a pair of Fendi cat-eye sunglasses and hoop earrings, while keeping her hair pulled back into a tight top knot.

"By the pool for my girlie Tera's Bday!!" she captioned it.

Tera Perez is one of Lopez's backup dancers, and has been performing in Sin City as part of the diva's All I Have residency at the Planet Hollywood Resort & Casino.

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Looks like Perez and Lopez were able to take some time off from their crazy-busy schedule to celebrate in style -- just check out that sparkly gold cake!

The girls looked equally as glam on Sunday afternoon when the two stepped out to the Carnival Del Sol pool party at Drai's Beach Club. The American Idol judge donned a teeny string bikini top, white shorts and an oversized sunhat, while her pal kept it classic in an all-black bikini and strappy sandals.

Perez took to her own Instagram account to share a pic, simply captioning it, "Love this chick."

So what’s the secret to Lopez's seemingly flawless beauty regimen?

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"Sleep is very important," she told ET last November. "I get my seven to eight hours of sleep no matter what."