Aniston takes a break from romance for a good cause. Plus: Teri Hatcher, Mischa Barton and more

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COMMON THREADS

Britney Spears's first husband, Jason Alexander (the two annulled their 2004 Las Vegas marriage after 55 hours), cozies up to Kevin Federline's ex-girlfriend (and mom to his two eldest children) Shar Jackson on Wednesday at the Jamie/Maddie Jeans runway show at L.A. Fashion Week. Chances are, their conversation was not about denim ...