Has Sharon Stone gone in for a little facial upgrade? Unless photographers were using frosted lenses at last night's A Smile For Every Child Gala, the actress was looking remarkably flawless on the red carpet.

Helped by some flattering lighting and make-up, the Basic Instinct star radiated youth in a simple taupe dress that set off her glowing complexion.

But her line-free face looked taut and strangely unexpressive, suggesting she may have overdone the botox.

The 51-year-old recently showed off her age-defying body in a topless cover shoot for Paris Match.

In the magazine, she credits her youthful attitude with keeping her young-looking, exclaiming (slightly inaccurately): “I’m 50 years old, so what!”

Shazza was at the 'Homeless not Toothless' event held at the Hotel Shangri-La in Santa Monica, California.

More stars ageing backwards