I LOVE Fashion Bug. I just went there before college started to get a new dress for our homecoming formal. I got a beautiful one for $25 and it fits like a dream. I usually wear between an XL and a 2XL and while other stores usually have clothing in those sizes, I always tend to find a ton of stuff at fashion bug that fits just right. My mom will sometimes just go in there, buy me something for christmas or a birthday and I'll love it.
Fashion Bug also has a bunch of nice dresses out now, if that's the way you want to go. I also got some beautiful shirts that would be quite fancy with a black skirt bottom or a bit more casual with jeans or khaki pants.