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

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 ...