The most popular hashtags of 2011 have been revealed, illustrating the perfect dichotomy in our culture between a penchant for serious politics and mindless celebrity gossip.
Hashtags are used to group together tweets relating to the same subject.
Top of the list was #egypt, followed by #tigerblood.
The first refers to the unrest in Egypt during the spring of 2011 while the second references a comment made by actor Charlie Sheen, following his sacking from a hit US comedy. BBC