April 25, 2007 07:30 PM

This week, the stars proved you don’t have to be in high school to get glam for prom. Turning out for a fundraiser to help kids in need pay for their gowns and tuxes thrown by Sharon Stone’s charity Planet Hope, Sharon turned back the clock in a vintage ’80s ballgown skirt given to her by Gianni Versace, a wrist corsage and a plastic tiara. “It’s really important that you have a little plastic when you go to the prom,”she told PEOPLE. Her look was a step up for her original prom ensemble: a coral dress, a sunburn and a red-headed date. “We had LOTS of shades of orange going on.” Fergie, a veteran of four past proms who wore “different color sequins every year” rocked Christian Dior and day-glo nails offset by a Pianegonda ring. “I’m definitely one who has lived through a lot of prom experiences,” she said, recalling a naughty post-prom beer bash that got her crew bounced from a motel. And Melanie Griffith arrived for her first-ever prom in a flapper-ish dress borrowed from her daughter and furry jacket given to her by husband Antonio Banderas — though she couldn’t get him to slip on a tux for the occasion, powder blue or otherwise. “He’s like ‘Prom? What is prom?'” she giggled, mimicking his Latin accent. “‘I have never had a prom.'”

Want to see more star’s in prom-like fashions? Check out our Big Night Style gallery here.

Photo: Stewart Cook/Rex USA

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