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The summer sun may be fading but the heat is on for the owners of Hollywood's hottest celebrity bodies. It's no good getting a sexy look for summer if you let it all slip between the last day at the beach and post-Christmas fitness regimes. With this in mind, as the days shorten the most image-conscious celebrities in Tinsel town will be moving indoors to make sure they don't lose their perfectly honed curves. Here we take a look at the high-energy workouts some of the world's most beautiful celebrity women will resort to in order to keep their muscle tone - even if they can't keep their tan!

The craziest celebrity fitness regimes

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