From L.A. to Paris, we've spotted some pretty stylish celebs adding dainty gold necklaces to their summery looks. Reese Witherspoon pairs her favoriteblack onyx Van Cleef & Arpels necklace with casual tanks for running errands in L.A. while Sarah Michelle Gellar wears similar style to an art event in N.Y.C. Cameron Diaz opts for a heavier chain with dangling charms while sight-seeing in Paris. Whether you go for an understated gold chain like Reese ...