#1. The dress

We love that this is, really, a classic LBD, but it has fabulous accents. The teardrop shapes are reminiscent of Marion Cotillard's white Oscars dress, but it's much more subdued. As is always the case, it helps to really OWN whatever you wear -- it might be raining in London, but Christina looks completely comfortable. Maybe because she has a FABULOUS dress ...