Nicole Richie at Shoes on Sale NYC Event Pictures

Nicole Richie popped up at the Waldorf-Astoria in NYC last night for QVC's Shoes on Sale event benefiting breast cancer research. She wore a black Helmut Lang dress and leopard heels from her House of Harlow collection for the charity evening, which also brought out Giuliana and Bill Rancic, Gossip Girl's Kelly Rutherford, and Kelly Bensimon. Nicole rocked the same animal-print booties while out in LA Wednesday and changed into flats with the same pattern to grab a treat with Harlow. Nicole and her kids spent time near home after, wrapping up a busy few weeks of travel that took them to London and Paris.