Jessica Alba
Joe Schildhorn /BFAnyc/Sipa USA

Jessica Alba (in DVF) joined Diane von Furstenberg for a night celebrating Girl Power at the Third Annual DVF Awards, held at the United Nations in New York. “My life mission is to empower women,” the designer told InStyle.com before taking the stage to honor five who have demonstrated leadership, strength, and courage in their fields, including Oprah Winfrey. Alba seconded the empowering spirit: “It’s incredibly important for women to support women, to highlight incredible work, courageous work that women are doing,” she told us. See more stars at last weekend’s hottest parties in the gallery.

— Leah Abrahams, with reporting by Randy Miller