Whyhas justin bieber turned so arrogant?

I don't hate Justin Bieber - I'm a fan of him but I do agree, the fame is getting to his head, I've watch videos of him on Youtube and he's just a diva now. I mean, I still like him but he just needs a reality check. "New style of music"? "Real music"? I don't think so, these are all music I've heard before, some of his songs are similar to Jesse McCartney's - or at least in my opinion. And what? Michael Jackson? No no, he actually created something new, you have not, you've just been using what everyone else has seen already. Real music? Only songs that he's written are real, the music that Usher gave him, just like any other music.