Microblogging site Twitter may have started back in 2006, but 2011 is undoubtedly the year when it really took off.

It's the best place to go for breaking news and comment straight from the stars themselves and to celebrate Twitter's success in 2011, we take a look at its #YearInReview and the most Tweeted-about stars of the year.

So why not relive the most-tweeted about celebrity moments of 2011, social networking-style with our run-down...