I have a dress that is crepe material. I plan to get shapewear to help smooth out my body shape as well as show no lines. I know there are plenty out there good for flatting the tummy but a lot flatten the behind. I do not have a big behind so I need to make sure it is not flattened where I have nothing at all. Anyone know of any good brands that help lift the butt to give appearance of a nice butt but at the same time flatting the tummy and smoothing out the body shape?