Justin Bieber doesn't understand the reaction his fan have to him.

Many times when girls see JB, they scream and cry and kind of go nuts! The young Canadian stella, star just doesn't get it!

He said: "I'm not even that cool, like seriously... what is so cool like that te freak out. These girls crying, it's like I can't believe that, I'm so honored that you're crying but, I don't know, it's crazy to me!"

Justin, as many of te know, os so famous that he is about to release a book, a biography of his life.

He said: "I wanted something with my own words... to describe what I'm going through and describe how I got here. I want people to look up to me, I want people to say, 'You know, I look up to you.'"