NEW YORK — The countdown continues. With just six shopping days to go, stores are abuzz with holiday shoppers. Cozy sweaters are always a favorite, and this season there are loads of options. Chanel and Ralph Lauren’s cashmere twinsets for example, are selling out at several stores. And who can resist fashion’s version of sugar plums? Shoppers are snapping up all sorts of designer confections, including anything with ruffles, lace and tulle.