Best Celebrity Style For December 19, 2011

In this week's crew of stylish celebs, dressed-down cool was the common denominator. Of course, there are a few exceptions — namely, Kate Middleton in a stunning velvet McQueen gown. Though, the royal gave us another look to love on the more casual side of things, joining the likes of street style-setters like Nicole Richie, channeling her bohemian-cool and Kate Moss working a glammed-up take on layers. That's just the beginning — click through of the rest of this week's top 10.