Shift Ranking of March 24: Most-Followed Accounts After 8 Years of Twitter03/24/2014March 24, 20141. @katyperry (51m followers) / 2. @justinbieber (50m) / 3. @BarackObama (41,9m) / 4. @ladygaga (41m) / 5. @YouTube (40m) / Source: TwitterCopy linkAdvertisement