So Undercover (2012)

"Meet the FBI's new secret weapon"

Overview

When the FBI hires her to go undercover at a college sorority, Molly Morris must transform herself from a tough, streetwise private investigator to a refined, sophisticated university girl to help protect the daughter of a one-time Mobster. With several suspects on her list, Molly unexpectedly discovers that not everyone is who they appear to be, including herself.