Iran's elections topped Twitter's list of most popular topics of 2009, according to the microblogging site.
"Among all the keywords, hashtags, and phrases that proliferated throughout the year, one topic surfaced repeatedly," the company wrote in a blog post Tuesday. "Twitter users found the Iranian elections the most engaging topic of the year. The terms #iranelection, Iran and Tehran were all in the top-21 of Trending Topics, and #iranelection finished in a close second behind the regular weekly favorite #musicmonday."
The fact that Iran's elections rose to the top on Twitter is noteworthy because Twitter itself became a tool for organizing post-election demonstrations in Iran.
In the category of top news topics on Twitter, items related to the Iranian elections and swine flu took five of the top six spots for the year. They were followed by Gaza, AIG, and President Obama's inauguration.
Among the most-discussed people of the year, Michael Jackson took the top spot. He was followed by singing sensations Susan Boyle and Adam Lambert, respectively. Kobe Bryant, Chris Brown, Chuck Norris, Joe Wilson, Tiger Woods, Christian Bale, and Alex Rodriguez rounded out the top 10 most-discussed people of the year on Twitter.
"Harry Potter" was the most engaging film of the year for Twitter users, followed by "New Moon," "District 9," "Paranormal Activity," and "Star Trek."
"American Idol" was the top television show on Twitter, followed by "Glee," the "Teen Choice Awards," "Saturday Night Live," and "Dollhouse."