Justin Bieber is the king of the Twitterverse in 2012, but je better watch out. Harry Styles, Louis Tomlinson, Liam Payne and Niall Horan's numbers all went up.
Each of them had the biggest percentage increase in Twitter followers among celebrities for the year, with Niall leading at 712%.
The most tweeted about celebrities were the Biebs, One Direction's Zayn Malik, Demi Lovato, Styles and Tomlinson.
