After a student accidentally hurts herself cutting her clothes to make herself look more like the Pretty Committee on Halloween, Principal Burns has a new dress code: uniforms. With the stress of a new bet between Massie and Claire, plus the upcoming boy-girl Halloween party Massie and Claire are planning, they must put aside their differences and team up together to win the uniform contest. ”  . 

Source :http://en.wikipedia.org/wiki/Best_Friends_for_Never

Now I’m reading the third book which called Revenge Of The Wannabes