Diane Von Furstenberg Dress what shoes?

I would try a black peep-toe with that dress. Depending on how long you hair is etc. I'd go with down and flowy/wavy...think Kate Hudson... you could accessorize with a bright coloured clutch of some sort... just thinking out loud...
 
i would probably make it a little bohemian? but since its a wedding i dont' know how casual you can be, but i'd have my hair up in messy curls or down in messy curls and some kind of cute jeweled sandals/thongs.