It’s also a brilliant number because if you set your heating to 18°C or below this winter, you’ll stop wasting up to £200 a year on your heating bills*. You’ll also sleep better and you may even shed a few pounds!

We’ve already seen our Facebook friends flaunting their most stylish indoor winter wardrobe in our ASOS.com competition. The lucky Emma Woodley bagged £500 worth of vouchers to spend on a new lovely winter wardrobe. Click here to see the winning entry and the best of the rest.

But don’t just listen to us, we’ve roped in all sorts of famous faces to show you how you can turn up the style and turn down the heat this winter. Just click on the videos below to see what they’re on about…

*For every single degree you turn your thermostat down, you stop wasting around £40 per year on your fuel bills. And most people have their heating about 5°C higher than it needs to be –ie, about 23°C.