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"Rebecca Black, Britney Spears&amp;#039; album Femme Fatale and Charlie Sheen were the top trending pop culture topics on Twitter in the first half of 2011. Twitter&amp;#039;s official blog revealed that the site&amp;#039;s users now collectively send more than 200 million tweets every day, the equivalent of 8,163 copies of Leo Tolstoy&amp;#039;s lengthy novel War and Peace. The site has divided its top trending topics into two lists. The first displays world events and news, and is topped by AH1N1, the swine flu virus. Prince William and Kate Middleton are in ninth place. However, the global "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/showbiz/news/a327970/rebecca-black-britney-spears-top-twitter-trends-of-2011/>