Justin Bieber is stepping back into the limelight as his new album Changes has released, marking the end of a 5-year hiatus for the pop star. But why the hiatus in the first place? At the height of Justin Bieber's career, he was selling out stadiums, touring around the world, had a notoriously dedicated fanbase, and made albums that were constantly at the top of the charts. So why step away from it all? Did he have some unknown personal issues going on? Or was he just tired of it all and simply needed a break?