In a special edition of Influencers with Andy Serwer from the World Economic Forum Annual Meeting in Davos, Switzerland, Yahoo Finance Editor-in-Chief Andy Serwer sat down with three female influential women in the world of finance, including Christine Lagarde, the International Monetary Fund Managing Director, Mary Erdoes, JPMorgan's Asset & Wealth Management CEO, and Lynne Doughtie, KMPG's U.S. Chairman and CEO. In a bonus interview, Andy chats with world famous musician, entrepreneur and philanthropist, Will.i.am.