The usually unnatractive poor friend who resents that her friend is prettier than she is and gets all the attention.
Usually when out the prettier friend will be told how
good looking she is all the time and admired by men and the uglier friend is ignored.
The prettier friend everyone will think is a model and all the guys hit on and the uglier friend gets ignored.
Then years later
the ugly friend realizes what a failure her life is and how she will never have the brains or beauty to be successful or rich in life and she comes on
the internet to hate and make up lies about the girl.