United States President Barack Obama emerged on the top replacing Chinese President Hu Jintao in the No. 1 spot of the  Forbes' list of the world's most powerful people in 2011, especially after the deaths of al Qaeda leader Osama bin Laden and Libyan dictator Muammar Gaddafi.

Sonia Gandhi with Barack Obama
Forbes' List of World's Most Powerful People

India's ruling Indian National Congress Party leader Sonia Gandhi (11th position) tops the Indian list with Prime Minister Manmohan Singh at the 19th spot.

Here is Forbes' list of the world's most powerful people:

1. Barack Obama
    President, United States of America

2. Vladimir Putin
    Prime Minister, Russia   

3. Hu Jintao
    President, People's Republic of China    

4. Angela Merkel
    Chancellor, Germany    

5. Bill Gates
    Co-Chair, Bill & Melinda Gates Foundation            

6. Abdullah bin Abdul Aziz al Saud
    King, Saudi Arabia           

7. Pope Benedict XVI
    Pope, Roman Catholic Church   

8. Ben Bernanke
    Chairman of the Federal Reserve, United States of America         

9. Mark Zuckerberg
    Founder, Facebook

10.David Cameron
     Prime Minister, United Kingdom

11. Sonia Gandhi
      President, Indian National Congress       

12. Mario Draghi
      President, European Central Bank           

13. Nicolas Sarkozy
      President, France           

14. Wen Jiabao
      Premier, People's Republic of China       

15. Zhou Xiaochuan
      Governor, People's Bank of China

16. Hillary Clinton
      Secretary of State, United States of America       

17. Michael Bloomberg
      Mayor, New York City   

18. Timothy Geithner
      Secretary of the Treasury, United States of America        

19. Manmohan Singh
      Prime Minister, India      

20. Warren Buffett
     CEO, Berkshire Hathaway