She’s a professional dancer, but everyone needs a night off.

Jennifer Lopez showed she’s an expert at finger dancing last night as she let loose from the safety of her sofa at a Las Vegas nightclub.

As the singer and dancer kept it low key, her toyboy boyfriend Caspar Smart leapt to his feet on the couch beside her, waving his hands around.

Hello fans! Jennifer Lopez shows off her amazing curves in a clinging blue dress as she arrives at an after party for her concert at Pure in Las Vegas

Party time: But Jennifer was feeling a bit tired after her long day – which saw her host a pool party before taking to the stage to perform

Perhaps Lopez was feeling a bit tired after her long day – which saw her host a pool party before taking to the stage to perform.

If she was it didn’t show in the mother-of-two’s appearance.

Jennifer had dressed to impress for her night out, displaying her curves  to maximum effect in a form fitting tight blue dress.

Hand dancing: J-Lo shows off her moves from the safety of the couch as Caspar Smart stands next to her

Dancing girl: Fresh from a tiring concert on the Vegas stage it was little wonder that J Lo wanted a sit down

The former American Idol judge had earlier celebrated her Enrique and J-LO World Tour with a special appearance and pre-party at Wet Republic Ultra Pool at The MGM Grand Hotel and Casino in Sin City.

She wore a matching all-white crochet ensemble which consisted of high-waisted shorts and a cropped top which allowed her belly button to be visible.

From behind, the item even showed off her sculpted back, although much of it was covered up by her highlighted locks which were pulled back into a half-up-half-down style.

Girl time: The singer was joined by her friends for her night out

She even carried an oversize ivory Birkin bag as she hit the blue carpet to pose for photographs.

The 43-year-old star emphasised her toned pins by ditching the sunbathing staple of flip-flops and wearing snakeskin heels instead.

Jennifer was accompanied by her beau, backing dancer Casper; however he didn’t pose with her and was simply there to hold her hand in support.

White hot: Jennifer celebrated her Enrique and J-LO World Tour with a special appearance and pre-party at Wet Republic Ultra Pool at The MGM Grand Hotel and Casino in Las Vegas, Nevada

Finishing touches: Jennifer wore snakeskin shoes and tied her hair back into a half-up-half-down do

Look at me! Casper got some attention of his own as he whipped off his top

The 25-year-old, looked noticeably younger than his partner in his casual get-up.

He wore red and white checked long shorts with a vest and accessorised with a Los Angeles Angels baseball team cap and Nike trainers.

Smart showed off his many tattoos and kept himself hydrated with a flavoured drink as he accompanied his girlfriend on her work duties.

Lopez has four-year-old twins, Max and Emme, with her most recent ex-husband Marc Anthony.

Although the couple separated a year ago she insists they still have a deep love for one another because of their children.

Hold my hand: J-LO was accompanied by dancer boyfriend Casper and showed off her back in a revealing top

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