The top news site by Facebook interactions is the Huffington Post, the study says, followed by London's Daily Mail, Yahoo and the BBC, before you get to the New York Times, the Guardian and CNN.com.

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But the article angered transgender campaigners, with some holding a candlelit vigil outside of The Daily Mail offices in London on Monday evening.

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London's Daily Mail newspaper paid for the interview, according to a source close to the Jackson family and another source familiar with the interview arrangements.

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