Top 20 reigning queens of the world

7. Mary Barra

#NAME Top 20 reigning queens of the world

As the first female CEO of a 100 year old automaker, Mary Barra has a tough job. General Motors employs thousands upon thousands of employees and produces millions of cars per year. Factor in the relentless competition that occurs in the auto industry, and one can see why Mary Barra is the 7th most powerful woman in the world.