23=. Jonathan Ross, Broadcaster

Partly responsible for provoking interest in Twitter when he broached the topic with Stephen Fry on his chat show just over three years ago, Ross has remained dedicated ever since, with regular flurries of replies to his followers, a short-lived attempt at a Twitter-based book club and, most recently, news of a new panel show for ITV based on the most-tweeted-about topics each week. "I'm making a new panel show called Trending Topics," he tweeted on 27 January. "Someone has to."

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