The Pretty One.
The main connection I see within this book to real life is that, many sisters fight everyday. Normally the stories are told from one of the sister's point of view talking about how they wish they were their sister. Either they are better looking than them, have better grades, are more social or they just don't like their life. Megan Fletcher, the main character, is jealous of her sister in every way possible. Her sister has the looks, the friends, and every guy is after her. If I was to take a survey on the people who were jealous of a sibling, there would be a high number. It is very common I think, to be jealous of others.