lt;p>Katy Perry and Claire Holt were also among the stars stripping down for ThirdLove and Kit Undergarments' Breast Cancer Awareness Month campaign.</p>
Kate Hudson poses in nothing but boots and her underwear for a heartfelt cause
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Kate Hudson poses in nothing but boots and her underwear for a heartfelt cause
Kate Hudson strikes some energetic poses in Instagram video as she works out in her underwear
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Kate Hudson poses in nothing but her black panties
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Kate Hudson poses in nothing but her black panties