So Undercover (2012)

When the FBI hires her to go undercover at a college sorority, Molly Morris (Miley Cyrus) 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.

• college
• fbi
• private investigator
• sorority girl
• undercover