For all of these, assume I mean an actual photo shoot with full-frontal nudity.
Victoria (of the WWE), Jennifer Love Hewitt, Lindsay Lohan, Elisha Cuthbert (especially after her ultra-tease in Girl Next Door), Kirsten Dunst, Laura Prepon, Mila Kunis, Jennifer Garner, Jessica Alba, Alicia Silverstone, Kerri Russel (the see-through and brief side-shot in Eight Days a Week don't count), Sarah Michelle Gellar, Alyson Hannigan, and Stephanie McMahon
That's all I can think of right now.