This is an interesting concept for photography. In real life, depending on the lighting... I'll bet it's a little more tricky to not make it look 'off'. I'm more of a highlight than contour girl - it's way more forgiving. Sometimes I'll dust a bit of Bobbi Brown Body Shimmer Brick along my collar bone, shoulders and back of my calves.
I've seen contouring abs (with a spray-tan gun)... that's pretty popular too.