Christmas ads are coming to TVs nationwide this week – M&S on Wednesday and Coca Cola on Saturday – so it's official, holidays are coming (did you guys sing that in your head, too?). We've got a few things on our mind: Christmas shopping (obvs), how long can we survive without switching on our heating and what cosy comfiness we're gonna invest in this year. Well, thanks to M&S' big seasonal campaign launch today featuring a £199 cashmere onesie, everyone's talkin' about #onesies again. We're ready to join Lena Dunham, Cara Delevingne and Chloë Moretz's gang, for sure. Now, who's gonna cook the turkey?