Confusion

So older posie has these cute little friends who are twins. I have known them now for 2 years. You would think by now I could tell them apart but some days are better than others. So the other day they were over at our house and I called out one of their names. Of course it was the wrong name and she said to me, "don't you know my name yet?" .... of course I do and I called by her name. That is not the worst part, there have been times where I have called them by the wrong names in front of their mom .... yikes embarassing! I was so glad last year when she cut one of the two girls hair, it helped but obviously not enough for me. Okay ... okay maybe I should not blame it on them being so similiar.... truth hurts. Maybe I have used to much hair color and its going to my brain.