Singer Lady Gaga has amassed so much fame and influence that she earned the number 7 slot on Forbes magazine's "most powerful women" round-up. Gaga came in ahead of Ellen DeGeneres, Beyonce and, yes, even Cristina Kirchner, president of Argentina.
So, who's the world's most powerful woman? First Lady Michelle Obama. The second? Irene Rosenfeld, chief executive of Kraft.
