Usually when it comes to overexposing a white background, not much effort is involved, usually it just requires 2 stops or more of overexposure of a light source pointed at the background and it's a done deal. However I have a situation that I'm not 100% sure what to with... I'm shooting a model for a cover of a magazine and basically it will be a picture of her laying down and the shot will be of her stomach and I'd like to have the background overexposed however I'm not sure how to do this since she will be laying down. I need a way to overexpose what she's lying on while still properly exposing her skin. Any suggestions? Thanks.