Now that the temperatures are finally dropping, we’re looking for a cool-girl layer that’s dressier than denim, but more original than a cardigan. Dakota Johnson found just the thing, and although hers has a Celine price tag, we found the chic fall look for only $32! A few weeks ago, Johnson turned up at the St. Vincent show in Hollywood wearing a green satin slip dress, black flats and a camel-colored suede cardigan that had an intricate hollow-out design. This Amazon twin has similar detailing along the hem — so yes, it looks designer. See it! Get...