It was around 26° last night when the amfAR New York Gala kicked off Fall 2013 Fashion Week. For some attendees, it was important to be somewhat weather-appropriate. Other folks just went right ahead and wore sheer dresses and showed plenty of skin, hypothermia (and good taste) be damned.

Was there a dress code? Or do stars just hear "CHANEL Tribeca Film Festival Artists Dinner" and assume through long practice that it's an occasion for black and white?

When it comes to fashion week, it doesn't get much more serious than Paris. And that goes double for the A-list front rows.

• Want free jeans? Don't mind handing a corporation access to your personal data and real-time location? Gap will give away 10,000 pairs of jeans to Facebook fans who "check in" to its stores on an as-yet-unannounced date tomorrow. [Fashionista]

• Today, brave teenagers and students will protest Abercrombie & Fitch's Fifth Avenue flagship for pumping that hideous stench into all of its stores, and transforming them into retail hellscapes. They contend that the disgusting cologne is an environmental hazard. [StyleList]

The French Vogue 90th Anniversary Party was a star-studded, high-fashion, My Fair Lady-style masquerade. And in the immortal words of Liz Lemon, we want to go to there.

• Marion Cotillard was shot, and apparently not retouched, by Bruce Weber for the cover of Italian Vanity Fair. Certainly it's preferable to that hackjob of a Vogue cover she was subjected to, but isn't the pose a bit awkward? [HuffPo]

• Annabelle Neilsen, on Alexander McQueen: "He was loved by so many, but felt loved by so few." A Scottish pipe band played at McQueen's memorial service, and Björk performed in a winged dress made of molded wood and feathers.

• Fashion diva Karl Lagerfeld held up a luncheon given in his honor because he refused to eat any food not made by Nobu. [Telegraph]
• Breaking: Anna Wintour briefly removed her sunglasses before the Derek Lam show. [NYObs]

• American Apparel's stock is tumbling this morning, following news that the company's dodgy accounting has caught the eye of the U.S. Attorney's office. It's currently trading at 0.83. [AMEX:APP]
• Dov says: "The capital structure issues will work themselves out." [WWD]

• A handbag will co-star with Christina Ricci in a "Donna Karan-friendly" film directed by Sting's son, Jake Sumner. So that's what we're calling "advertising that aspires to go viral" these days? [WWD]

Who showed up for the "90 years of Vogue covers" party at Hotel Crillon in Paris last night? Lara Stone! Julia Restoin-Roitfeld! Anna Wintour! And, of course, Lindsay Lohan!

• Nicolas Ghesquière picked the intolerably cool Charlotte Gainsbourg to advertise Balenciaga's perfume. Ghesquière calls his friend "one of the most inspiring girls in the world." Gainsbourg said, "I was secretly hoping to be the face of Nicolas' first perfume." [WWD]

• Freida Pinto and Evangeline Lilly are new faces of L'Oreal. To mark the occasion, Lilly said she's proud "to represent a brand whose ambition is to...contribute to the fulfilment [sic] and well-being of everyone." [PRNewswire]

So, what exactly was the dress code at last night's 2009 American Museum of Natural History's Museum dance? Some stars — Milla, Alba — looked flawlessly glam. Others wore robot costumes. I'm confused!

Ever had to dress one way on the weekend and another way at work? And maybe a third way for socializing? Does your mind reel at the complexity? W feels your pain. (Not really.)

• Sam Ronson is mad at the animal-rights protester who threw flour on LiLo's fur stole! Blogged the DJ, "the girl who threw [the flour] acted like an animal herself...I take that back, it's an insult to animals to group her in with them, my dog is FAR more civilized than that person." [ElleUK]
• Meanwhile, Natalie…

• Mini moguls Mary Kate and Ashley are dipping their tiny feet into the world of fashionable footwear. They're teaming up with Steve Madden to add a shoe line to their Elizabeth and James label. [ElleUK]
• Weirdly, model Twiggy's husband calls her Twiggy too. [Daily Express]
• Moddles fall all over the runway on Prada's…

• Is Gossip Girl pretty boy Chace Crawford set to replace McDreamy as the face of Versace? [Perez Hilton]
• Fashion slang seems to have no regard for a word's actual meaning: "Designer Ashleigh Verrier said her favorite fashion word was "diaphanous" — an adjective characterizing fineness of texture. 'As in, 'That dress is…