Who is the top teen star on Twitter? It’s Justin Bieber, by a landslide. Like it’s not even close. The Biebs, 18, has a whopping 27 million followers, making him one of the most followed people in the world and easily the most followed teen and teen heartthrob. Of course he is nipping at Lady Gaga‘s 140-character crown, but he has nearly double the follows of his closest teen Twitter foe, who just so happens to be his girlfriend Selena Gomez!