My 5 yr old sister likes to put on makeup, why?

Well I would think the answer would be pretty obvious but I guess not for you. She's a 5 year old girl and girls her age like to play dress up and put on makeup. I did when I was that age, so did my sister and all of our little girlfriends. I don't where makeup now, but it was always fun to play dress up or act grown up when I was that age. Why are you so concerned anyway? The actions of a 5 year old have nothing to do with how she's going to be as a teenager and even if she is who cares.