"Basic Instinct" star Sharon Stone, who has stopped gymming, is planning to go on a vacation and is concerned about her not so shapely derriere.

The 56-year-old is under pressure to look good in a bikini while on holiday.

"I haven't worked out in a couple of months because I just didn't feel like it," Stone told eonline.com

"But now I'm going on vacation and I know what they're going to do - (the tabloids) are going to put a circle around my ass and do one of those crazy magnified pictures saying, 'What happened to her ass? It's a bag of cheese.' I would just like to say it's a fine triple creme brie!"

But the mom of three seems to have some idea to spice it up.

"Right when they zoom in, I should have a tattoo on my ass that says, 'You wish you could get a bite of this'," she said humourously.