Twitter's top 2011 hashtags: #egypt and #tigerblood

The most popular hashtags of 2011 have been revealed, illustrating how Twitter spans diverse topics from politics to 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.

Sheen made the headlines in 2011 for a series of often rambling public rants which culminated with the comment to online celebrity gossip site RadarOnline: "My fangs are dripping tiger blood."         Full Read