Some of Rachel McAdams' mean girl moments are completely out of control, but a lot of it feels surprisingly real. Plus, it's the only movie that includes "mathletes", puking on a crush, and a person getting hit by a bus (and still making it to prom!).
"Walk to Remember" Starring Shane West and Mandy Moore. This chick flick will bring a tear to anyones eye when West finds out that the love of his life is dying from Leukemia. "Titantic" Starring Leonardo DiCaprio is now considered one of the most saddest chick flicks of all time.