It's arctic outside, and rumour has it we'll be having a white Christmas. Which is great if you've stocked up on this season's chunky knits but not the kind of weather we want to brave in our party dresses on Christmas Eve. Which is why we'll be taking our style cues for uber model Natalia Vodianova this week. We love that she's slipped a fine knit, black polo neck under her sequined frock. Cosy and chic, plus it gives her whole look a fashion forward 1970s vibe that is so next season. We recommend Gap or Zara for the perfect polo.