Teenage sensation Justin Bieber is being forced to adapt his music to suit his changing voice as he copes with the effects of puberty. The 16-year-old Canadian singer is relying on his vocal coach to get him through a slightly difficult time in his career. “oy voice is definitely changing, gradually. It’s definitely lower,” he says. “I think that everybody’s voice changes. It’s just how you go through it. I have a great vocal coach that’s helping me.” As a global hitmaker, Justin leads a busy life, but says he is allowed one day off a week to live a more normal lifestyle. “I make sure I have at least one day off a week. I need one day of downtime. The rest of the week is all jam-packed.”