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David Beckham is the most powerful in the world of sport according to Alvin Hall, presenter of World's Most Powerful. But should it have been Tiger Woods?

Tiger Woods v David Beckham
Tiger Woods is golf's world number one. David Beckham is probably the world's best known footballer. But which one is more powerful?

Bill Gates v Steve Jobs
Bill Gates' software runs the world's computers while Steve Jobs is credited with starting the PC revolution. Who is the most powerful?

Oprah Winfrey v Madonna
Oprah Winfrey is queen of the TV chat show. Madonna is a pop icon for millions around the globe. But who is the most powerful?