Get Nude! The best of this week's parties

Chloe Sevigny at the Cliquot Manhattan Polo Classic and Calvin Klein's celebration of Visionaire's new Solar issue

Alexa Chung in gorg. Chanel shoes

Valentina Zelyaeva and Heloise Guerin at Calvin Klein's celebration of Visionaire's new Solar issue

Cristina Tosio and Barbera Garcia at CK's celebration of Visionaire's Solar issue

Kelly Klein and Lily Donaldson at the lighting of the 50-foot Burberry sign at its new headquarters on Madison Avenue

Kate Bosworth at Rodarte's fete in London

(Source: style.com, tfs)