Jennifer Lopez rocks sexy bikini top and huge hat for rowdy Vegas pool party

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Jennifer Lopez Wears Sexy Bikini, Makes Hosting Debut at Epic Las Vegas Pool Party

Jenny from the block is back!

Jennifer Lopez was ready to party when she showed up to the Carnival Del Sol pool party at Drai's Beach Club at the Cromwell Las Vegas on Sunday afternoon. The age-defying entertainer rocked a bright string bikini top with a pair of little white shorts.

WATCH: Jennifer Lopez Shows Off Toned Bod In a White Hot Bikini In Miami

Before joining the summer festivities, J.Lo posed for pics in a huge, and we mean HUGE, hat. Lopez's longtime boyfriend Beau Casper Smart joined her on a balcony at the pool party, and the 46-year-old star let loose as she danced and grabbed the mic to speak to the crowd below her.

Lopez looked half her age as she partied in her teeny bikini top. When ET spoke with the mother-of-two, she revealed her most important beauty secret. "Sleep is very important," she shared. "I get my seven to eight hours sleep no matter what."

WATCH: Jennifer Lopez Says She 'Can Feel a Bit Chunky,' Admits Her Weight Fluctuates Up to 8 Pounds

See photos from her Vegas residency:

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Jennifer Lopez Las Vegas Residency
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Jennifer Lopez rocks sexy bikini top and huge hat for rowdy Vegas pool party
LAS VEGAS, NV - JANUARY 20: Singer/actress Jennifer Lopez performs during the launch of her residency 'JENNIFER LOPEZ: ALL I HAVE' at The Axis at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
LAS VEGAS, NV - JANUARY 20: Singer/actress Jennifer Lopez (L) performs with a dancer during the launch of her residency 'JENNIFER LOPEZ: ALL I HAVE' at The Axis at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
LAS VEGAS, NV - JANUARY 20: Singer/actress Jennifer Lopez (C) performs with dancers during the launch of her residency 'JENNIFER LOPEZ: ALL I HAVE' at The Axis at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
LAS VEGAS, NV - JANUARY 20: Singer/actress Jennifer Lopez (C) performs with dancers during the launch of her residency 'JENNIFER LOPEZ: ALL I HAVE' at The Axis at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
LAS VEGAS, NV - JANUARY 20: Singer/actress Jennifer Lopez (C) performs with dancers during the launch of her residency 'JENNIFER LOPEZ: ALL I HAVE' at The Axis at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
LAS VEGAS, NV - JANUARY 20: Singer/actress Jennifer Lopez (C) performs with dancers during the launch of her residency 'JENNIFER LOPEZ: ALL I HAVE' at The Axis at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
LAS VEGAS, NV - JANUARY 20: Singer/actress Jennifer Lopez performs during the launch of her residency 'JENNIFER LOPEZ: ALL I HAVE' at The Axis at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
LAS VEGAS, NV - JANUARY 20: Singer/actress Jennifer Lopez performs with dancers during the launch of her residency 'JENNIFER LOPEZ: ALL I HAVE' at The Axis at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
LAS VEGAS, NV - JANUARY 20: Singer/actress Jennifer Lopez (C) performs with dancers during the launch of her residency 'JENNIFER LOPEZ: ALL I HAVE' at The Axis at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
LAS VEGAS, NV - JANUARY 20: Singer/actress Jennifer Lopez (R) performs with a dancer during the launch of her residency 'JENNIFER LOPEZ: ALL I HAVE' at The Axis at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
LAS VEGAS, NV - JANUARY 20: Jennifer Lopez performs during the debut of her residency show JENNIFER LOPEZ: ALL I HAVE at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
LAS VEGAS, NV - JANUARY 20: Jennifer Lopez performs during the debut of her residency show JENNIFER LOPEZ: ALL I HAVE at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
LAS VEGAS, NV - JANUARY 20: Singer/actress Jennifer Lopez performs during the launch of her residency 'JENNIFER LOPEZ: ALL I HAVE' at The Axis at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
LAS VEGAS, NV - JANUARY 20: Jennifer Lopez performs during the debut of her residency show JENNIFER LOPEZ: ALL I HAVE at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
LAS VEGAS, NV - JANUARY 20: Jennifer Lopez performs during the debut of her residency show JENNIFER LOPEZ: ALL I HAVE at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
LAS VEGAS, NV - JANUARY 20: Jennifer Lopez performs during the debut of her residency show JENNIFER LOPEZ: ALL I HAVE at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
LAS VEGAS, NV - JANUARY 20: Jennifer Lopez performs during the debut of her residency show JENNIFER LOPEZ: ALL I HAVE at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
LAS VEGAS, NV - JANUARY 20: Jennifer Lopez performs during the debut of her residency show JENNIFER LOPEZ: ALL I HAVE at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
LAS VEGAS, NV - JANUARY 20: Jennifer Lopez performs during the debut of her residency show JENNIFER LOPEZ: ALL I HAVE at Planet Hollywood Resort & Casino on January 20, 2016 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
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