Here's a hypnotic before-and-after gallery of pinup models and the pinup drawings they became. (No. 6 is my favorite.) It also seems that in the pinup lies the origin of the beloved/reviled kissy face. Is there an official name for that face? It seems to have metamorphosed from a sexily surprised "oopsie doops, my skirt flew up" expression to the stale and trouty "female douchebag face," as it's described here.