Spot the difference, fashion fans! The Roland Mouret dress on the left has been worn (in various versions and colourways) by the likes of Demi Moore, Keira Knightley, Naomi Watts and Cameron Diaz, and while the black version has been copied across the high street (the best offerings coming from Oasis and Coast) this is the first time a checked version has appeared. The dress on the right is a great likeness, and it's only £40 at ASOS. Whatever did we do while they were gone?!