12. One Direction
Twitter Handle: @onedirection
Twitter Followers: 11,076,996
Facebook Likes: 14,499,866
Fan Base Nickname: Directioners
Best Fan Account: @1DIRECTIONATION
Craziest Fan Moment: When Harry Styles and Taylor Swift broke up, the 1D fans went insane, flooding Taylor's mentions with threats.
One Direction has hit fan-pandemonium on a level that hasn't been seen since the days of 'N Sync and Backstreet Boys. Fans wait hours outside screaming and crying. They are die hard, they are young, and they will do anything for the boys of 1D.