On Tuesday Night, the model stepped out in London for the Dior Backstage launch party, dressed in a backless plunging vest and glamorous tulle Skirt by the fashion house, teamed with polka-dot pointed pumps and a mesh-dressed beret. Later on in the evening, Bella switched up her look, channeling cool, comfy vibes by swapping her Full Skirt for a pair of Ripped denim mom jeans, belted in at the waist. Talk about a trade! Read on to see all the pictures of Bella's genius move.