i modeled this dress to try out he cloth modifier. it turned out better than i thought, though it sags a bit in the wrong places, i think it need more stiffness applying to the top section, some how :/
the belt is made by duplicating an edgeloop and deleting the cloth mod and adding a solidfy mod, then modelling the buckle from a cube.
the character model is not mine. It is one i down loaded from Blendswap
http://www.blendswap.com/blends/characters/realistic-female-character/
only the dress is my work