Location is not important, she is entering adolescence and has a raging hormone storm inside. Take her to a doctor to check on her developmental progress and respond to any emerging needs she may have as her body changes, that you are currently unaware of.
What exactly do you mean? Where does she have fuzz like hair? If you mean her face that's normal as long as it's not visible. If you mean "down there" it's a sign of going into puberty. But if you mean she only has fuzz on her head that's not normal at all...but I doubt that's what you mean.
I have it on what I believe is my neck...