If the film section of the forums had a guilty pleasures thread this film would be in it for me based off this trailer.

http://www.youtube.com/user/SummitScreeningRoom?feature=chclk

When five sorority girls inadvertently cause the murder of one of their sisters in a prank gone wrong, they agree to keep the matter to themselves and never speak of it again, so they can get on with their lives. This proves easier said than done, when after graduation a mysterious killer goes after the five of them and anyone who knows their secret. Starring Briana Evigan, Rumer Willis, Audrina Patridge, Leah Pipes & Jamie Chung, SORORITY ROW opens in theaters on September 11.