The slip dress: what could be better than a piece of clothing which singlehandedly combines the primness of your granny, the dishevelled raunchiness of Courtney Love and the slinky sex appeal of an Agent Provocateur campaign? Nothing, of course, as Pixie Geldof knows – she wore a Marc Jacobs maxi slip to the British Fashion Awards

As well as being this season's most glamorous evening option, you can also rock yours during the day. Wear a little lacy slip underneath your favourite fuzzy jumper, and pair with sleek accessories and a chunky boot for a new take on 90s grunge.

Shop the 20 best party dresses edit.