Trick the lens and look slimmer in photographs -- all you need is good posture. Lengthen your figure and appear taller by stepping back on one foot and standing up straight; don't slouch. Push shoulders back slightly to slim arms, and lift your chin just a little to elongate your neck. Always turn three quarters when looking at the camera -- facing the lens dead-on won't look nearly as flattering. Whatever you do, don't hold your breath or buckle your knees -- you could pass out, especially if your gown has a snug corset!