Fashion Faceoff: Celeb vs. Celeb

Gemma Arterton vs. Kenya Moore both in Lanvin

Rumer Willis vs. Hilary Duff both in Mara Hoffman

Jennifer Lopez vs. Jun Ji-hyun both in Dior

Katy Perry vs. Khloe Kardashian both in Celine

Vanessa Hudgens vs. Karolina Kurkova both in DVF

Whitney Cummings vs. Kelly Rowland both in Izmaylova