I still very much love the idea of separates.  It used to be sort of dated but when done right it can be thoroughly modern and fun, even "couture".

I found this picture of Sarah Jessica Parker in a Versace gown in a preview of the series "100 Unforgettable Dresses" and even though it is technically a gown, the sheer shimmery smoky tulle top paired with a contrasting french blue ruffly rosette ball skirt is really stunning and even whimsical.

Credit: 100 Unforgettable Dresses