Having already apologized to our celebrity gossip readers to for overlooking an array of Kim Kardashian nude photos from her recent Playboy pictorial, it looks like another mea culpa might be in order.

A few months ago, we posted a picture of Holly Madison naked in an ad for PETA (and against fur). Well, it looks like the number-one girlfriend of Hugh Hefner posed for a second advertisement on behalf of this grating, attention-loving organization.

Check it out now: