<strong>Biggest Twitter event: London Olympics: </strong>Twitter users produced 150 million tweets during the 16-day summer games in London. The opening and closing cermonies proved the most tweeted moments, with 116,000+ tweets being sent per minute during the the Spice Girls' performance. Jamaica's Usain Bolt was the most-discussed athlete -- his gold-medal win in the 200m sprint sparked 80,000 tweets per minute.
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