We think NYC area hospitals should be on alert: TMZ reports that Britney Spears is headed to NYC. Well, if not NYC, something close:"Spears left Van Nuys Airport at 4:00 PM PT this afternoon. We're told Brit Brit, Adnan and one other male passenger were on the plane. The plane is about to land at Teterboro Airport in New Jersey. Next stop ... unknown."Coupled with earlier TMZ reports about Spears apparently needing treatment for "severe......