German chancellor Angela Merkel has been named as the most powerful woman in the world by business magazine Forbes for the third year running.
The Queen and JK Rowling are the only British women to appear in the top 100, in 40th and 93rd place respectively.
Brazilian president Dilma Rousseff is second in the list, and Melinda Gates, co-chairman of the Bill & Melinda Gates Foundation is third in the list which, although international, is dominated by Americans.
The 10th annual ranking sees the Queen, who at 87 is the oldest on the list, drop 12 places from last year, while US first lady Michelle Obama who was number one in 2010, moved up three places from last year to fourth place.
According to Forbes, this year's index represents women who are pioneers in politics, business, media, humanitarian concerns, entertainment and the technology industry.
It also features a number of women who are listed due to their wealth, with all ranked by money, media presence and impact.
The top figures in the entertainment industry are Americans Beyonce Knowles in 17th place, Angelina Jolie in 37th, and Lady Gaga in 45th after dropping 31 places.
Mrs Merkel tops the list for the third year running and makes her eighth appearance on the list, while former US secretary of state Hillary Clinton, who was second last year, dropped down to fifth place.
The top women in tech are Facebook chief operating officer Sheryl Sandberg in sixth place, IBM chief executive Virginia Rometty in 12th, Hewlett-Packard chief executive Meg Whitman in 15th and Yahoo! chief executive Marissa Mayer in 32nd .
The women, who are from 26 countries, have 153 million Twitter followers between them and 16 of them founded their own companies.
There were 15 newcomers this year, including South Korean president Park Geun-hye in 11th place, Tory Burch, chief executive of Tory Burch in 69th and Spanx founder Sara Blakely in 90th.
Moira Forbes, president and publisher of ForbesWoman, said: "This year's Power Women exert influence in very different ways, and to very different ends, and all with very different impacts on the global community.
"Whether leading multibillion-dollar companies, governing countries, shaping the cultural fabric of our lives or spearheading humanitarian initiatives, collectively these women are changing the planet in profoundly powerful and dynamic ways."