She has always slept around, she is a controlling backstabbing bitch who whines and complains when the same thing is done to her = immature

She is only say 24 or so perfect example of a teenager who still needs to grow up

A good friend of mine knew her when she started out as the "outcast". She said Taylor and her friends were a bunch of mean girls. " She was a complete bitch"

One experience is not preclusive of the other. It could very well be that she did feel a bit geeky and outsider growing up, and has outgrown that phase of her life. Or it would not be abnormal for someone very popular and socially "successful" to have feelings of inferiority or loneliness or like they don't "fit in." Whatever, who are we to tell her what her experience is or has been?