Stalker Targetting Britney Spears’ Fiance?

Sources tell ‘Extra’ that Britney Spears is beefing up security. ‘Extra’ spotted the happy couple Sunday night after a ‘Fahrenheit 9/11’ screening (which features Britney’s interview with CNN’s Tucker Carlson), flanked by bodyguards. Apparently, Kevin has been receiving threats and may even have a stalker.