Jack Nicholson has warned young celebrities to create a "safety zone" to protect them from the temptations of fame following the sudden death of Heath Ledger. The actor was saddened by the death of Ledger last month (Jan08), amid rumours the Australian actor was caught up in Hollywood's drug culture - as well as the plights of Britney Spears, Lindsay Lohan and Paris Hilton, who have all suffered the averse affects of alcohol and drug dependency. Nicholson, at 70, is a long-time hellraiser - but he insists he always protected himself. The Oscar winner warns, "You can get anything out there if you are young and famous. Any woman. Any drug. But you have to build up your safety zone."