A hired bodyguard who follows a celebrity around in their likely travels and advises against doing anything inappropriate that the media would eat up and ruin the celebrity's image/occupation/life. This can include things like Drunk driving, bong- hitting, girl- raping, and the like. They have also been known to carry weapons utilize violence on the media as a final resort
Paris Hilton went to jail because she didn't have a Stupidity Advisor. Same with Britney Spears, except she would go to jail for marrying K- Fed.