Justin Bieber and President Obama were retweet machines. Plus, some of the top conversations of the year ignited over the U.S. elections, the Olympics, and Superstorm Sandy.
The social media company, which set up a dedicated site for 2012, used both data and "editorial signals" to showcase the top moments and conversations around several themes:
The company also partnered with Vizify to allow all Twitter users to visualize their Twitter year for free. It identifies each person's key themes for the year and portrays them in "a while new way."
Not too surprisingly, the most retweeted tweet of the year was President Obama's tweet on election night that said "Four more years" and showed a photo of the president embracing his wife.
Twitter noted that within hours, the tweet simultaneously became the most retweeted of 2012 and the most retweeted ever. And retweets came from people more than 200 countries around the world.
Runner-up was a tweet from Justin Bieber saying goodbye to a fan who died from a rare form of brain cancer in September.Along with most retweeted, Twitter ranked the top trends in categories like conversation starters, politics, TV, sports, movies, music, food, and countries.
For the tech category, Twitter noted that new product announcements -- like the iPad, iPhone, and Kindle -- caused spikes in their Twitter discussion. And other buzzworthy tech terms reflected the social nature of sites like Skype, Pinterest, and Draw Something.
Here's the top 10 trends for tech:
Twitter also rounded up some notable tweets of 2012, such as Green Bay Packers player TJ Lang voicing his frustration after a "replacement ref" made a much-disputed call during the final play of the Packers-Seahawks game.
And the biggest conversations of 2012 revolved around the presidential election, summer Olympics, and Superstorm Sandy, among other topics.