Stephanie Pratt NUDE For PETA: Spencer's Sister Naked (PHOTO)

06/21/2010 05:12 am ET | Updated May 25, 2011

Stephanie Pratt has taken her clothes off again, this time for a good cause. Stephanie occasionally appeared on 'The Hills' and is the estranged sister of Spencer and sister-in-law of Heidi Montag. She is also famous for her DUI arrest and Us Weekly bulimia confessional.

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