It was a busy night for partygoers in NYC last night, but even with all of the event hopping, they still managed to don their very best looks for our viewing pleasure. We saw our usual suspects like Leandra Medine and Chelsea Leyland in all of their typical well-dressed glory. Meanwhile, Katharine McPhee turned heads in a pair of leather leggings at a pre-Super Bowl celebration. Click through to see all three stellar looks, as well as the other best dressed guests of the night.