by Celebrity Features Editor Zoe Drewitt

Life in the limelight is not without its downside - being stalked by sick fans has to be every star's worst fear. Top stars have to surround themselves with bodyguards and employ top security firms to analyse obsessive fan mail and frightening phone calls which may indicate crazed admirers or even potential killers. According to psychiatrists, most celebrity stalkers have lost touch with reality and believe what they see on screen is personally related to them. For others it is as much about wanting to achieve their own notoriety - everyone wants their 15 minutes of fame. Here are just a few A-listers who have suffered at the hands of obsessed fans...