Hair Color Help!

I have an appt to get my hair colored next Thursday and I'm still not sure what I'm going to do! That picture is a recent one to what my hair color is right now. I usually just get blonde highlights (my hair is naturally a dark blonde), but I think I want to go dark this time! Does anyone have any suggestions as to how I should go about that? I'm not sure if I want to do all over color, low lights, or what! I really like the color of Jess Alba's hair, but I'm not sure how to go about getting there! Has anyone ever gone from light to dark? Thanks!!


Only 3 more days till Christmas!!