There are always It Girls everywhere you look out East, but this weekend truly took the cake - or, should we say, the champagne? From Nicole Richie's House of Harlow bash with Revolve and Olivia Palermo's Moët rager, to an Erin Wasson dinner and the launch of Armarium x Missoni, chic partygoers had a fully packed schedule. Click through for everything you missed!

[Photo by Joe Schildhorn /]