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Britney Spears' Weird Workout Gear? It's a Sauna Suit!

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Britney Spears maximises her workout in a futuristic 'sauna suit top' as she hits the gym

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Britney Spears maximises her workout in a futuristic 'sauna suit top' as she hits the gym

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Britney Spears maximises her workout in a futuristic 'sauna suit top' as she hits the gym