Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Greatest Hits !!

This is the best thing in the world that could happen to me ! A Britney Spears DVD with all of her music videos ! I'm so happy ! Yay !! Britney's videos are always good and theres couple of videos that I've never seen !! I'll definitly buy it ! It's a must have for all of her fans !