Sheryl Sandberg, billionaire and chief operating officer of Facebook Inc., pauses during a panel session on day four of the World Economic Forum (WEF) in Davos, Switzerland, on Saturday, Jan. 25, 2014. World leaders, influential executives, bankers and policy makers attend the 44th annual meeting of the World Economic Forum in Davos, the five day event runs from Jan. 22-25. Photographer: Chris Ratcliffe/Bloomberg via Getty ImagesBloomberg via Getty Images
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Last year was all about Sandberg: Her bestselling book, Lean In, helped her become the face of corporate gender equality. This year is all about Facebook. Its 2013 profits jumped an astounding 2,730%, mainly because of increased revenue from mobile ads, and it announced huge deals in early 2014 to acquire virtual-reality company Oculus VR for over $2 billion and buzzy messaging platform WhatsApp for $19 billion. As CEO Mark Zuckerberg's No. 2, Sandberg remains crucial to the company's long-term strategy. She's also the best-paid woman on our list, making $38 million last year.