I had no idea, that facebook can be personalized until I came across a site with a bunch of free facebook skins and themes. Than you can guess the joy and the happiness to see that there is a free Hello Kitty facebook theme too! And it looks really pretty.
Here is a preview image for this lovely pink Hello Kitty facebook theme!
I really have no idea how to install a facebook theme 
So now I need to reserch on that to… Until now I managed to understand that I need some firefox plugins to be able to do that, but I am sure it can be so hard to do it.
Check here: free facebook skins and themes or here: Customizing facebook for info on installing the Facebook theme, and don’t be disapointed if it goes away, because it looks like Facebook changes the way it handles the styling very often. Good look with installing the Hello Kitty Facebook Theme Hopefully I manage to finish my work earlier today, and will try to do it myself.
I need to search for some Hello Kitty Twitter themes too!
Wow.
Very nice theme. thank you very much