Justin Bieber can no longer hit the high notes

Justin Bieber has revealed that he is already struggling to sing some of his hits because his voice is breaking, according to reports.

The Canadian singer, 16, admitted that he is struggling with the changes of growing into a man, and even finds singing his hit Baby difficult.

Bieber added that his famous voice is changing all the time.

He said: "It cracks, like every teenage boy. Even some