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Through the years, Playboy has managed to attract some top flight talent to appear in the all-together. So in honor of the Bunny's half-century milestone, TheWrap takes a look at some of the top celebrities who have taken a turn as Playboy cover girls -- from sultry sirens such as Pamela Anderson to funny girls like Marge Simpson, with a mercifully short stop-off at the truly frightening. (Sorry LaToya!)