Justin Bieberis taking steps to ensure he’ll still be able to hit the high notes when his voice changes.

In a new interview with Vibe, the 16-year-old spoke about the importance of ensuring his voice survives puberty. “Everyone’s voice changes. Puberty is a natural thing. I have the best vocal coach in the world and we’re working on my voice and doing what I need to do,” Justin explained. “It’s not like as soon as you hit puberty you stop singing.”

The Usheris helping him make the transition to adult star. “Usher is the best mentor in the world and he survived puberty. He tells me what to do, what not to do.”

But Justin is already eyeing a career beyond music. After news of his guest role on CSI, in which he’ll play a troubled teenager, he has hired an acting coach and is eyeing roles on the big screen. “I have fun with acting and I’d like to do more,” Justin admitted.

“Comedy is really fun. I can be serious. Whatever roles are good for me I think I will take. I’d like to work with Martin Lawrence. He’s one of my favourite actors.”

But the star has denied he is launching a hair product range. “I think the obsession with my hair is funny... I don’t have any product in it.”