Justin Bieber is vocal conditioning due to puberty

Singer Justin Bieber is taking vocal lessons conditioning as a support to alleviate the effects of puberty, said the site Gigwise Friday (11). 

The fans realized that the voice of teen star began to fail during theperformance of Bieber at the American Music Awards in November.The singer's record label, Island Def Jam, hired voice coach JanSmith, who also helped Usher, Bieber's mentor when he passedthrough the same changes in 90 years.