From today's Done Deal report on script sales:

"Title: Door to Door
Log Line: An ambitious teenage beauty leaves Michigan to become an actress in Los Angeles. She dates a movie star, who helps her get a job working the door at the hottest club in L.A. and suddenly doors open for her. [Oh! I get it now! It's a pun about doors!]
More: Novel. Britney Spears and her manager Larry Rudolph will produce. Britney Spears to also star in. The book is published by MTV Books."

The project is reportedly on hold while Britney does intensive research on doors.
Door to Door [Done Deal]