[All photos by BILLY FARRELL for PMc]. Tuesday it was Valentino at Boom Boom, Wednesday it was Chanel at The Four Seasons. The Fine Jewelry line hosted The Society of Memorial Sloan-Kettering Cancer Center's annual "Fete d'Hiver." Chanel darling Diane Kruger, and Gossip Girl's Blake Lively, were seen chatting throughout the night, which they hosted along with Camilla Belle and Claire Danes. Guests including Nina Garcia, Charlotte Ronson, Leigh Lezark, Lauren Santo Domingo, Derek Blasberg, Dayssi Olarte de Kanavos, Eugenie Niarchos, and Ferebee Bishop Taube enjoyed cocktails and dinner and music courtesy of The MisShapes because when Chanel and any good cause team up, everyone will turn out.