Charlotte Ronson stepped out to support pal Nicole Richie at a bash celebrating her collection for Macy's Impulse at Daniel's in New York City. "It’s final decision time!" the Fashion Star mentor told InStyle of her line when we caught up with her at DoSomething.org and Bing's Summer of Doing event earlier this week. "I’ve been working on it for a long time so I’m really excited." The lineup is set to launch this September and includes maxi skirts and crop tops in retro prints. Click through the gallery to see more stars at last night's hottest events.
—Leah Abrahams, with reporting by Nakisha Williams