Ryan Dunn

By DAILY MAIL REPORTER

Quick change: After arriving for the Carousel Of Hope ball in a floor-length Georges Chakra gown, Jennifer Lopez swapped into a Zuhair Murad minidress

Her hair in an updo, gown sweeping the floor, Jennifer Lopez looked like a classic Hollywood beauty as she swept down the red carpet last night.

But the moment she stepped inside the Carousel Of Hope ball the singer shook down her curly locks and swapped the grown-up Georges Chakra dress for a slashed Zuhair Murad mini.

The 41-year-old showed off her shapely curves in the revealing outfit, complete with Jimmy Choo shoes, as she performed onstage with husband Marc Anthony.

She's got the moves: As JLo spun around the stage, her beaded dress revealed her shapely curves

The beaded gown twirled and spun as Jennifer danced around the stage, singing her romantic duet with her husband.

Jennifer's quick change didn't go unnoticed. Paris Hilton tweeted: 'Jennifer Lopez and Marc Anthony just performed at the event. J Lo looked amazing as usual, she is absolutely stunning! Love her!'

Paris certainly made an effort herself. The blonde arrived in a floor-sweeping pale pink gown for the bash, which took place at the Beverly Hilton.

She tweeted: 'On my way to the Carousel Ball. I feel like Cinderella in my pink Chagoury Couture gown and beautiful Chopard diamonds.'

The look of love: JLo didn't need to fake her emotions as she dueted with husband Marc Anthony

The 29-year-old was joined by her mother Kathy, 51, who showed where Paris gets her blonde good looks from.

It seems Paris has also inherited her mother's sense of fun, with Kathy lifting her layered black dress to perform a jig for the cameras.

Last night's bi-annual ball was held to raise money for the Barbara Davis Center for Childhood Diabetes in LA, a cause it has raised more than $75million for over the years.

Celebration time: Marc Anthony, Jennifer Lopez and Halle Berry clap as the award winners are honoured

Among the guests was Nikki Hilton, who attended the previous ball with her close friend, heiress Casey Johnson, who has since died of complications from her diabetes.

The ball also holds special meaning for actress Halle Berry, who is among the famous sufferers of the disease.

Fittingly, she chose last night as the venue for her first public appearance with boyfriend Olivier Martinez.

Family values: Paris Hilton and her mother Kathy were both at the ball, along with sister Nikki

Other guests, who paid $1,000 a ticket, included Rachel Uchitel, the nightclub promoter famous for her affair with Tiger Woods.

The big names included Stevie Wonder, Joan Collins, Rod Stewart, Tom Hanks and Raquel Welch.