Holly Madison: Nude for PETA

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Granted, it doesn't take a lot to get Holly Madison nude.

But she isn't doing it for a hot tub party or to fulfill the wishes of Hugh Hefner in this picture.

Instead, one of the three Girls Next Door - and Hef's main squeeze - is participating in an ad campaign for PETA. She wants to save the world, one animal (and layer of clothing) at a time:

Holly Madison Nude

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.