Dianna Agron
Dianna channeled her inner (if contemporary) Grace Kelly with her beautiful red Rosie Assoulin dress at the Bare premiere. The fit-and-flare skirt, complimentary halterneck, and open back gave the gown a bit of an edge while still retaining an overall classy elegance. Nothing could compete with the color of this ensemble, so Dianna cleverly paired it with neutral pumps instead.