World's 100 Most Powerful Women

1. Angela Merkel, German Chancellor

2. Janet Yellen, Federal Reserve Chair

3. Melinda Gates, Philanthropist

4. Dilma Rousseff, President of Brazil

5. Christine Lagarde, Managing Director of International Monetary Fund

6. Hillary Clinton, former Secretary of State

7. Mary Barra, CEO of General Motors

8. Michelle Obama, First Lady of the United States

9. Sheryl Sandberg, Chief Operating Officer of Facebook

10. Virginia "Ginni" Rometty, Chairwoman and CEO of IBM

For the full list, methodology and videos, visit Forbes.com.