Question: I am a movie director and I just received the following movie plot. Could you help me answer this question? If not, let me know by writing "Not answerable".  Plot title: Vanilla Sky Movie plot: From a prison cell where he has been charged for murder, David Aames (Tom Cruise), in a prosthetic mask, tells his life story to court psychologist, Dr. Curtis McCabe (Kurt Russell). In flashback, David is shown to be the wealthy owner of a large publishing firm in New York City which he inherited from his father, leaving its regular duties to his father's trusted associates. As David enjoys the bachelor lifestyle, he is introduced to Sofia Serrano (PenÃ©lope Cruz) by his best friend, author Brian Shelby (Jason Lee) at a party. David and Sofia spend a night together talking and fall in love. When David's former lover, Julianna "Julie" Gianni (Cameron Diaz), hears of Sofia, she attempts to kill herself and David in a car crash. Julie dies but David survives, his face grotesquely disfigured,[4] leading him to wear a mask to hide the injuries. With no hope to use plastic surgery to repair the damage, David cannot come to grips with the idea of wearing the mask for the rest of his life. On a night out with Sofia and Brian, David gets hopelessly drunk and Sofia and Brian leave David to wallow in the street outside. David is awakened the next day in the street by Sofia, who apologises for deserting him the night before, and takes him home. The two continue to see each other, and David has his face surgically repaired despite being told it was impossible before. Though his life seems perfectly content, David finds oddities, such as brief visions of his distorted face, and a man (Noah Taylor) at a bar that tells him David can control the world and everyone in it, if he wanted to. One day, when he goes to Sofia's apartment, he finds Julie there instead; all of the previous mementos of Sofia now show Julie's face. Angry and confused, David suffocates Julie, and is later arrested and placed in a mental institution, finding his face has reverted to its previously disfigured state. David completes telling his story to Curtis, who proceeds to then visit David further for more sessions to try to help him recuperate. During... My question: Who is David's former lover?
Answer:
Julianna