Cory Monteith, Pope Francis, the Super Bowl: 9 things people couldn't stop tweeting about in 2013[ Thu, 12 Dec 2013 05:18:10 GMT ]In 2012, President Barack Obama sent out the most retweeted message in the seven-year history of Twitter. It read, simply, "Four more years," with a picture of him embracing the first lady. This year, politics took a back seat to pop culture.