It's gorgeous, the only detail wrong is the style of the skirt. Marie Antoinette wore skirts that were wide at the hips, rather than ballgown style skirts. But your art of her is astounding and gorgeous!
this is a beautiful drawing....and I am totally wit you, I love her too, she was just young and dumb and totally misunderstood. And I do not think this needs to be colored because the bg is so strong and she looks to be lightly colored to begin with. Its very beautiful.