Jennifer Lopez cuts a devastatingly curvy silhouette in sheer rhinestone-encrusted bodysuit

Prep the shower and turn the temperature to freezing cold... because Jennifer Lopez is back in THAT bodysuit. 

The 43-year-old who scoffs at the ageing process and wears clothes rather than letting them wear her, looked divine as brought her brand of Latino disco to Madrid tonight.  

All that glitters: Jennifer Lopez performed at the Palacio de los Deportes in Madrid, Spain tonight

And while J-Lo watchers are no strangers to the dazzling countour-hugging number, it's appeal wasn't diluted by repetition as the mother-of-two threw a succession of lascivious shapes. 

Lopez resumed her Dance Again tour in Portugal after taking a break to celebrate her 43rd birthday. 

The singer put on a free show for 1,500 fans on Thursday as a warm-up to her Dance Again world tour, which officially kicked off in the city on Friday night.

Doors opened at the Pavilhao Atlantico to a 20,000-strong crowd, who went wild for the former American Idol judge. 

Fans at the show, which was also attended by her four-year-old twins, Max and Emme, cheered wildly when JLo waved a Portuguese scarf.

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The shows see Jennifer going through her biggest hits and a variety of eye-catching costumes that showed off her toned abs and famous derriere.

The Jenny from the Block hitmaker began her Dance Again World Tour on June 14 in Panama City, travelling across Latin America before kicking off her co-headlining tour with Enrique Iglesias throughout North America on July 14. 

Meanwhile, rumours are swirling about the status of the singer's relationship with toyboy Casper Smart - her back-up dancer and newly-anointed head choreographer of the tour.

Last week, Jennifer was spotted rocking some serious bling on her ring finger, prompting speculation Casper may have asked the singer to marry him.

Dancing again: Nothing stops Ms Lopez from doing her thing 

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Jennifer was in France for Paris Fashion Week with Casper and her daughter Emme when she stepped out with the sparkler.

Array: Ms Lopez wears dozens of sparkling, tight costumes in the show 

However, neither party has addressed the claims.

Back in June, Smart opened up to ABC News about what it's like mixing business with pleasure by dating his current boss. 

'Sometimes I tell her something, give her notes and sometimes she gives me notes (on performing),' he said. 

'But at the end of the day it doesn’t matter whose position is what because she’s the boss.'

And, he revealed, it was not love at first sight between the pair. To the contrary, a romantic relationship seem to come as a surprise for the both of them.

'It was nothing before, no flirting, no nothing. It's just natural, it just happened,' he said.

Just a few weeks prior to their ABC News interview, rumours spread online that Lopez and Smart had gotten engaged, but JLO quickly put the rumors to rest via her website.

'Rumors!!! Don't be fooled by the rocks that I got,' Lopez wrote, using a reference of her 2002 popular song Jenny from the Block.

'No engagement!'