what has caused justin bieber to be out of control with his behaviour?

I think that up until the trouble started he had people around him that kept him in line. Now that he is over 18 and has money power and fame he does what he wants. If anyone around him tries to slow him down or tells him what to do he replaces them. So some of it is a spolied kid. I also do agree that some of it is also not haven privacy and the paparazzi always trying to get the money shot. Thats my 2 censt lol

Rick

Everything started when Selena dumped him in early 2013. She was a huge part of what kept him grounded. His friends are also a terrible influence, and his mom, manager and team never give him any guidance or discipline. However, he has been doing a lot better in the past 2 or 3 months.

Fame is crazy. He seems pretty upset with the paparazzi, and if you had to be surrounded w/ about 20 men shoving cameras in your face, I'm guessing you would be too. I'm not a "belieber", but I do believe that his actions are partly due to the paparazzi and the fame.

He wants to be in the headlines more because he realizes he's not as popular as he was., Also because he's a spoiled douche.

'Murica.

Sorry, but America has a lot of problems... Highest teen pregnancy rate, obesity, etc.

He's sexyyy ;))