I agree with JTimbs, blonde will totally wash you out. Even that Hayden picture, her hair is still blonde on top, the underlayers are just darker.

Also agree with insomniac, nothing wrong with being blonde, but some people who aren't naturally blonde and go blonde don't suit it because of the colouring of their skin, eyes, and natural pigments in their hair. I personally don't think it'd suit you to go fully blonde. Go in and get a few varying highlights in, of a few different blonde shades and maybe some lowlights. You'd get a nice blend.