Is there a way you can change your user name?

I see that some people have their user names changed, like for example somebody had 'I love the Jonas Brothers!' or something along the lines of that. I am pretty sure that isn't their REAL user name/e-mail so I am guessing there is a way to change it. If there is, could someone please tell me how? Thankss!:dIs there a way you can change your user name?sure..the same way you started it