There are a lot of controversial issues in the entertainment business. Though one of the ones we see the most often is that of childhood fame. The industry, both music and film, has seen a plethora of musicians and artists become affected by garnering loads of fame too early in life, and we know what the phenomenon typically entails. So, why does it keep transpiring? Regardless, there are several musicians to have undergone this career arc, and they have both benefited and been affected negatively by it. With all that in mind, here are three musicians to acquire international fandom before they turned 20 years old. Justin Bieber Justin Bieber is and has been one of the biggest musicians on the planet ever since he released his hit single, "Baby," in 2010. When Bieber released the single, he was just 15 years old, and thanks to the single's success, he became one of the most popular musicians on the planet. As of now, Bieber still impressive...