Cheers to powerful women! Facebook's Chief Operating Officer, Sheryl Sandberg, held a talk at Barnes & Noble in New York to promote her new empowerment book Lean In: Women, Work, and the Will to Lead, where she was joined by famous first daughter Chelsea Clinton. The tome is a career guide for women in which Sandberg—one of the 100 most influential people in the world—compels them to "lean in" and assert themselves more on the job. Find it for $25 on amazon.com.
Plus, see more of the week's star-studded parties!