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At the annual Sidaction AIDS benefit dinner in Paris last night, Carla Bruni, in purple strapless satin Yves Saint Laurent, did what she does best: reveled in the spotlight and upstaged every other dolled-up female—Mischa Barton, Vanessa Paradis, Diane Kruger, Dita von Teese, Milla Jovovich, Laeticia Casta, Dasha Zhukova, Virginie Ledoyen—in the room.

It had been an eventful day in the French capital, as a million workers went on strike to protest Carla's husband Nicolas Sarkozy's handling of the economic crisis, but needless to say the festivities of the evening's event, held at 18th century hunting lodge Pavillon d'Armenonville and the crown of couture fashion week, were unaffected.

A good thing too, as not only was a million dollars raised for the Sidaction AIDS charity (whose president is Pierre Bergé, the late YSL's former boyfriend and lifelong business partner), but a bubbling-under trend became official: Yes, if you've been wondering whether the necklace-as-headband look, first seen on Mary-Kate and Arden Wohl, is permissible, last night's noteworthy endorsement of the style from Dasha and model Sasha Pivovarova provides your answer.

Fashion First: Mrs. Bruni-Sarkozy Sweeps Annual Sidaction AIDS Gala [WWD]
Superglam Carla Bruni-Sarkozy shows Hollywood stars how it's done at Paris Fashion Week gala [Daily Mail]
Hair Jewelry: the new A-list way to embellish your look [Elle UK]