Katherine Heigl in Prince Valiant (1997)

Following up his 2005 smash The 40 Year Old Virgin, writer-director Judd Apatow elicits huge laughs and heartfelt warmth with Knocked Up (2007). Apatow regular Seth Rogen portrays a fumbling-through-life stoner who stumbles into the bed of an E! entertainment TV reporter, played by curvaceous Grey's Anatomy beauty Katherine Heigl. Ms. Heigl keeps her vitals off-camera in Knocked Up, so check out the European version of the 1997 adventure Prince Valiant. At the 54-minute mark, 19-year-old Katherine, playing "Princess Ilene," lifts steps out of the bath and, while slipping on her royal robe, reveals a perfectly round regal rump. The appropriately titled thriller Side Effects (2005) casts its gaze higher. Twenty-four minutes in, top-heavy Miss Heigl whips off her hard-working bra and we get some sweet side views of the Knocked Up starlet's killer knockers.

Mr. Skin

Check out all Katherine Heigl's nude scenes at MrSkin.com