She also explained the art of looking great while juggling a modern woman's everyday life.
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Earlier the German beauty was in news for launching her own lifestyle website and revealing her secrets on parenting, relationships, fitness and nutrition on the online platform.
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Lifetime president and general manager Nancy Dubuc explained that a nude Klum, who has four kids with husband Seal, will help the network convey a new message "brazen, strong, confident and sexy" women.
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The 38-year-old model agreed to go naked to promote the show's ninth season, which aspires to embrace a sexier image and a new definition of the 'contemporary women'.
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Supermodel Heidi Klum has posed nude for Project Runway ad campaign.