10. Oprah Winfrey - 4,631,372 followers

 

 

Even Twitter was hit by the Oprah Winfrey effect! The traffic chart shows the daily market share of visits to her Twitter website from January to April.

On April 17, the day when Oprah Winfrey joined Twitter by sending a tweet from her Friday TV show, the number of US based visits to the Twitter site increased by 24 percent and some 1.2 million new users signed up for Twitter on that day alone.