Who is the world's most powerful celebrity?

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In most walks of life the natural hierarchy is a subtle business of quietly sizing up who has the biggest office at work, the snazziest car on the street and the best-looking spouse. In the world of celebrities things are much more straightforward: there's a list. The Forbes list of the most powerful celebrities in the world reveals whose star is rising, who is earning the most and garnering the most interest - and who will be signing up for the jungle next year.

So who did it rate as the most powerful this year?