Like the others said, I would talk to her. Sometimes people are insecure and they feel the need to make themselves feel cool by lying about things. I have a friend who I'm very close to, and to most people she seems very confident, but sometimes she will say extreme things or change herself for her boyfriends because I think deep down she has almost no self-confidence.

If you talk to your friend and she is sorry about lying to you, I would forgive her. Sometimes people do dumb things. If it was me I would forgive her as long as she didn't do it with an intent to really hurt me.