Today was Britney Spears's first day of shooting her new music video for "Till the World Ends" in LA, and she wrapped up the action by twittering a behind-the-scenes picture of herself on set. She wore furry boots, ripped tights, and a studded leather jacket as she sipped on her Vitamin Water. The pop star has been hard at work preparing for the release of Femme Fatale and the second promo for her GMA performance was recently released. She still makes time for her boys, and spent Sunday cheering Sean Preston on at his Little League game where she was photographed with her ex Kevin Federline for the first time since 2006. Some of Femme Fatale's tracks have been leaked on the Internet and so far most of you are loving her first two official singles. Brit's Castro theater show is just over a week away, and we're so excited to see her hit the stage again!