Miguel, Rihanna, and 50 Cent are only a few celebrities who have a strong presence on the new social networking tool, Twitter. In the past year, we have seen celebrities take their accounts back from their management team and expose their thoughts and lives to their fans, as well as to their opposers. When given the outlet to directly express themselves at any given moment, drama is bound to happen, and if you stick around long enough, the beef just might pop up on your Twitter timeline. Check out the Top Twitter Beefs of 2011.