Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Pretty bad movie

I saw this movie on the plane to Europe and to tell you the truth I didn't like it at all. It's a bad story itself, but the actors were horrible. How could Cameron Diaz sleep with her sister's boyfriend? I think it's one of those movies that if you don't see you don't lose anything. It's bad, real bad.