Inseparable: Jennifer Lopez and her boy toy beau Casper Smart party the night away in Sin City

Jennifer Lopez is savouring every moment with her much younger backing dancer beau Casper Smart

The two partied the night away yesterday at Hyde nightclub in the Bellagio Hotel & Casino in Las Vegas as they celebrated the launch of her new single Goin' In.

The superstar diva, 42, arrived at the event dressed to the nines in a form-fitting metallic and white mini dress that showed off her toned legs to perfection.

Constant companions: Jennifer Lopez arrived hand-in-hand with boyfriend Casper Smart to a party last night in Las Vegas celebrating the release of her new song

She completed the look with a pair of studded gold pumps and a matching gold clutch bag.

 

After posing for pictures outside of the event, Jennifer was escorted inside to the VIP area.

She and Casper, 25, danced the night away and were said to have stayed until 3am.

Showing his support: Casper remained by Jennifer's side throughout the evening

Something to celebrate: Jennifer dressed to the nines for the celebration marking her latest endeavour

Earlier in the night, Jennifer spent the evening with the other man in her life, estranged husband Marc Anthony.

The exes shared an emotional reunion at their ¡Q'Viva! The Chosen live show at the Mandalay Bay resort.

Jennifer and Marc have continued to put on a united front during ¡Q'Viva!, which started out as a reality TV series, searching for talent throughout Latin America.

Emotional reunion: Jennifer and Marc Anthony shared several tender moments during their ¡Q'Viva! The Chosen live show at the Mandalay Bay resort

Warm embrace: Marc affectionately wrapped his arms around his estranged wife and hugged her

When she is not working, the American Idol judge appears to spend much of her free time with Casper.
It's been revealed that Jennifer, who is a veteran in the love department, is the dancer's first serious girlfriend.
In December, his father Roy, 58, declared: 'I don’t remember any girlfriends in the past. Certainly nothing serious. He’s been an elusive kind of a guy with girls.
He never brought any girl home or anything. I thought he was single but he doesn’t really tell me about his love life.'