Our favorite fashionable party-goers celebrated the end of the week in style at last night's NYC events. Katie Holmes, Hilary Rhoda, Chelsea Leyland and many others all donned some head-turning looks for The New York Observer 25th Anniversary. Meanwhile, Hannah Bronfman made the party rounds in a stellar midriff-baring ensemble. Click through to see all of the winning looks from Thursday night's events.
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Sunday, December 8
Click through for some great insider tips from the \"Swoon\" master herself.