Sorority Row (2010)

Cassidy (Briana Evigan), Jessica (Leah Pipes), Ellie (Rumer Willis), Claire (Jamie Chung) and Megan (Audrina Patridge) are sorority sisters and true-blue friends to the end -- until a prank gone wrong results in Megan's demise. Rather than risk their futures by reporting the crime, the friends agree to cover it up. Cassidy and company come to regret the decision a year later when someone begins sending them videos of the night Megan died, and they fall victim to a deadly stalker.