Tina Fey's cult-classic teen film "Mean Girls" was inspired by Rosalind Wiseman's 2002 self-help book, "Queen Bees and Wannabes."
After Fey read Wiseman's book, which details the ways in which teenage girls form cliques and develop aggressive behaviors, she came up with the idea for the teen film.
Since then, the story has also been adapted into a Broadway musical.