The 33-year-old daughter of Bruce Willis and Demi Moore flashed her cleavage in a plunging baby blue top, which also bared her midriff, while celebrating the opening of Jacquemus' new boutique.

Midriff flossing, though ... The light linen fabrics, the tonal, natural hues and simple silhouettes were all part of the appeal – as were the delicate straps that wrapped around the models ...