If a last minute party invite lands on your doorstep, this great little product will help you add a bit of festive shimmer to your look without the prep required before a full fake tan. Xen Tan's Flawless Logic (£23) is a stick bronzer that goes on like a gel and dries like a powder, adding a glow to the skin wherever you want it. It's particularly good on the collarbones, shoulders, and arms if you're going strapless but will also work smoothed down the shins if you're brave enough to go without tights despite the low temperatures. A little goes a long way, so apply sparingly and blend before you top it up. It's perfect for hiding imperfections and creating a soft-focus J Lo glow.