Justin Bieber has frankly discussed his own mental health battles, as part of a revealing new YouTube documentary.On the newly-released Justin Bieber: Next Chapter, the singer discusses how he experienced suicidal thoughts and “consistent” pain throughout his darkest periods.“There was times where I was really, really suicidal,” Bieber says.“Like, man, is this pain ever going to go away? It was so consistent, the pain was so consistent.“I was just suffering, right? So, I’m just like, man, I