[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.  More»