Oh Sophie, I'd murder you on the dance floor if you wore this out of sheer, green eyed jealousy.
Seriously, I mean white tights, awesome MJ shoes, antique-y brooch at the middle of a peter pan collar, tiny little puff shoulders, pin tucked pleating down centre of dress and lovely red lips! However, I am disappointed with your bag choice. Shame on you to wreck such a perfect ensemble with bad bag selection.
She does have a wonderful sartorial style... google agrees!