Anyone of any size should be able to dress in whatever style they like.
In the Starlight
That link is for a store where she makes everything to your measurements so you can get "plus" sizes.
There really shouldnt be any distinction between "plus" and regular sizes I think...its all relative and putting people in a category like that just segregates them further and contributes to the 'fat phobic' north american culture.
Im not "plus" size, so all this probably sounds like bull' from me, but im not a tiny girl either (40" bust, 33" waist, 5'8)