The best way to showcase your festive flair this holiday season? With your decked-out, holiday nail design. We've put together the ultimate advent calendar of holiday nail art for the days of December, and it's got enough holiday nail designs to keep you busy from now until January 1 -- whether you spend it curled up watching "The Christmas Story" for the umpteenth time, sipping hot cider by a crackling fireplace, or jetting from one champagne-fueled fete to another.