We're loving the latest shape-up plan by online fitness experts GymCube.com – their new Little Black Dress online workout and diet plan is designed to get you looking svelte super-fast for a great night out in your LBD. Award-winning personal trainer Katie Bulmer-Cooke who has been listed alongside Madonna's personal trainer, has created the workout for women of all ages looking to tone up this party season. And the beauty is you can do the online Little Black Dress workout in the comfort of your own home, and at a time that suits you. To celebrate our new namesake plan, we're giving away three 12-month GymCube.com memberships worth £72 each, and a gorgeous dress from LittleBlackdress.co.uk (that should keep you motivated!). For your chance to win, head over to our Twitter page to enter now. See full Terms and Conditions here