With over 40 million followers, Justin Bieber is now officially the most followed person on Twitter. Behind him are big names such as Lady Gaga, Katy Perry, and United States President Barack Obama.The teenage pop singer used his official account to thank his fans for helping him become the only person in the world to have over 40 million followers. He ended his tweet with the hashtag #40MillionBeliebers.However, according to Socialbakers, one of the top social media statistics platforms, nearly half of Bieber's current followers are either fake or inactive. Most of these accounts have never been used before, have less than one follower, or are following less than 50 accounts. Excluding such accounts, the teenage pop star's real following would equate to around 18 million. With the fact that just four years ago, he had only 40 Twitter followers, this is still a remarkable achievement and a reflection of his huge fanbase.DigitalSpy posted the statistics of the amount of real followers that Justin Bieber and other popular Twitter accounts have.