She has a doppleganger?

This article I found in BBC web, exactly in this web: http://www.bbc.co.uk/slink/sexlovelife/reallife/doppleganger.shtml#2, in this article speaks with a girl Olivia, that she thing that she has a doppelganger, because first her neighbor say that she sees Olivia with her friend in the town and they past next to Angie, the neighbor, and she didn’t say anything. But Olivia said that she went to the town this day. Another time a friend of her mum, say to her mum that she saw Olivia smoking and drinking, but Olivia knows that she is innocent, because she didn’t like drinking and smoking, but after Liv, mum’s friend, said that she has a mistake because the girl that she said the other day tint her hair, and Olivia has a natural color. Olivia things this is strange, but she had just believed in it. But definitely one day she went to the shopping center and a girl, asked her if she like the new look of Jack, Olivia stay impressive because she didn’t know what it’s Jack and he never look his girl…
For Olivia this is a mistake that never can know because she never sees her doppelganger

3 new words:
- Doppelganger: doble - Tint her hair: Cabell tenyit - Impressive: impressionada