5. OLIVIA WILDE

Movie: Alpha Dog (2006)
After starring in the short-lived but very sexy series, Skin, and guest starring as bad girl Alex Kelly on The O.C., Wilde’s motel room romp with Emile Hirsch in Alpha Dog should not have been as jarring. Maybe it was the the fact that we could finally put an actual image to the fantasy created by restrictive TV-14 ratings that took us aback.