When you hear the words "holiday season," you might think floor-grazing dresses and cocktail-appropriate fit-and-flares. But us? We think of pyjamas. There's perhaps no better time to work your cosy separates on the street. Pair them with a red lip and satin heels, and you've nailed a look that's sultry. But work your oversize flannel with boyfriend jeans and must-have loafers for brunch, and you're off-duty chic. Whether you prefer long robes or you're more of a slip girl, we've gleaned 11 tips from the celebrities ahead. Their memorable outfits will help you try out the trend for yourself, and we've gathered plenty of pieces to help you do so.