Question: who has tweeted the most?
Answer: Lady Gaga (81.7m followers) ...  Donald J. ...  Cristiano Ronaldo (86.3m followers) ...  Taylor Swift (86.5m followers) ...  Rihanna (97.3m followers) ...  Katy Perry (108.3m followers) ...  Justin Bieber (112.2m followers) ...  Barack Obama (120.7m followers)