Facebook has just put out its Year in Review, documenting the most-discussed topics of 2013 – and number-one is probably going to surprise you.
The worldwide Top 10 includes lots of stuff you might expect, such as Nelson Mandela and the royal baby. But topping the list is Pope Francis, who became Pope in March. Here's the full Top 10.
Facebook also ranked topics in a number of countries, including the United States. In America, the Top 10 was:
The top life events people posted online were: Added a relationship/got engaged/got married, traveled and moved.