Pretty actress and model Kelly Brook recently had lunch with boyfriend Billy Zane and although what the couple did was just normal human behavior (celebs DO eat, you know), what the paps liked was Kelly’s thong-panty peek. She wore a very sexy black thong! What a sure way to increase the appetite and the visuals, right? Kelly did fix her pants later on but then again, the paps already had the money shot. Click click click for more of Kelly in black thongs!