U.S. actress Sharon Stone attends an auction at a charity dinner for The Foundation for AIDS Research (amfAR) during Milan's Fashion WeekMILAN (Reuters) – U.S. actress Sharon Stone bounced back from a hospital admission at Milan fashion week to chair a star-studded fundraising gala on Saturday. Stone, 55, was admitted to hospital with a migraine after attending a runway show by Italian fashion house Fendi on Friday, raising questions over whether she could chair the Saturday AIDS research fundraiser as planned. The "Basic Instinct" star suffered a health scare in 2001 when she was hospitalized for a brain aneurysm – bleeding in the brain that can cause stroke – after suffering severe headaches. …