Alert, alert! They’re everywhere!

Demi Moore was all smiles at the BBQ thrown by Chanel and online art-appreciation start-up Art.sy Wednesday evening at Soho Beach House in a grey clingy mini shorts ensemble accessorized by studious-looking eyeglasses, way long hair and fabulously toned legs. Moore, there with rumored paramour Vito Schnabel, posed with Lenny Kravitz at the fete. Also along for the ride: actor turned anti smoking campaigner Stephen Dorff; TV personality/chef Katie Lee, who finally dropped the “Joel” from her last name, likely a relief for the Piano Man, fixture about town Russell Simmons; and George Clooney’s powerhouse girlfriend Stacy Keibler. Ahem, where was Mr. Ocean’s 11, please?

A few stiletto steps away, Valentino and Interview mag threw a tres prive affair atop The Webster to celebrate the designer’s Pop Pois (polka dot) collection. Bond girl Olga Kurylenko, in a white strapless dress, stuck by bf, actor/director Danny Huston, son of the late, great John Huston. Owen Wilson arrived with billionaire/art collector Peter Brant (hubby of supermodel Stephanie Seymour). Martha Stewart posed for photos by the Belvedere Red bar, then pulled out her own camera to get some photographic souvenirs. Stewart made the rounds, also attending the Haute Living and Roger Dubuis dinner at Villa Azur.