Twitter has revealed its top hashtags for the year. The top hashtag this year was #egypt, following the downfall of president Hosni Mubarak in February. Other popular trending topics included the Arab Spring and the Japanese earthquake.

The year's top eight hashtags are:

1. #egypt

2. #tigerblood

3. #threewordstoliveby

4. #idontunderstandwhy

5. #japan

6. #improudtosay

7. #superbowl

8. #jan25

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