Summer sales thrive like dandelions, but besides impulse shopping and buyers remorse, we've been talking in the office about an unnamed syndrome: When you see a girl walk down the street, and say in your head, "Oh, I know where she got that; it's from [designer] and it cost [price]." Perhaps the most epidemic example is Chloe's mosaic dress, which first appeared on Ikeliene and then spread to Michelle Williams and Tory Burch before scattering into socialite wardrobes. Meanwhile, we have a massive crush on the Miu Miu dress at left, but after Stam etc. wore it in Vogue, it goes from, "Oh, cool dress," to "Oh, you have that Miu Miu?" We even vacuum packed our favorite Marc by Marc dress because Bee Shaffer was photographed wearing it at the US Open. It finally came out of the closet this summer, after two years in hiding. And last night on the aforementioned hipster rooftop, Brad Walsh was wearing the Lindsay Lohan sweater from Forever 21. And that's exactly what it was called, by at least four girls as they walked in the room. A recognizable bag is one thing ("Omigosh, I can't believe she bought the Indy..."). But is it just as desirable when everyone can ID your clothes?