Britney Spears kept up her constant string of Primp hoodies, back in the black one on her way into the Four Seasons (natch) last night. She looked a little worried, but I can't blame the girl for being stressed with the paparazzi swarm — hell, her driver couldn't handle it for more than a couple nights before quitting. Britney shot her new video for "Piece of Me" into the wee hours of Thursday morning, but rather than wait until January to see that hit on MTV, Jive wants to see what her fans can come up with. Starting Monday, they're holding a make your own video contest for the new single and the winning one will air on TRL Dec. 20. So what do you think, any amateur video director out there eager to show off a piece of Britney?