One of the changes boys go through when they are teens is voice change, which can be pretty dramatic at times.
This change really bothers guys, because they have no control over when their voice will crack. It cracks and fluctuates until, at times, their new voice is nothing like their old voice.
But what if this is happening to you and you are a singer? It could be the end of your career!
Justin Bieber fans are worried about this happening to him. And it is happening and we have proof of it. He has even said as much, admitting that: it is hard for him to hit certain notes and that at times his voice trembles when he does live shows.
Now Justin will have to work twice as hard to master his new musical instrument: his new voice. He will have to learn to both control it and get used to it, as will all of his fans.