Jean-Marc Nattier – Marie-Anne de Nesle, Marquise of Tournelle, Duchess of Chateauroux (1717-1744) Château de Versailles

The picture has something of this: woman, people, girl, nude, wear, portrait, model, fashion, light, ballet, ballerina, glamour, fantasy, water, levitation, reclining.
Perhaps it’s a painting of a woman in a white dress holding a bird in one hand and a key in her other hand, with a sky in the background.