What to do about a hoe-friend that lies about everything?

my friend use to do that all the time but, like, she lied about other stuff and all. either overwhelm her with guilt by being really nice and truthful (works EVERY time, as long as she isnt a b*tch) oh and trust me! karma works!!!!!!! it was the perfect revenge, i got mad at her so i drove off without her, sh had to walk home, the one day it was raining, LOL!!!!! lets see...oh! start lying to her! but not about the same stuff. it will get to her eventually. she'll hopefully get the hint. good luck. this is the advantage of being creative, in njhs (smart peoples club), perfect behavior at school and at home. yet, i am actually very evil...