Question about Lauren Conrad and Audrina Patridge?!?!?

In LA Candy by Lauren Conrad who is Scarlett in real life? The names are altered for privacy reasons so its not the real name of the person but it is based on Lauren Conrad's life.Scarlett is described to have tan skin, dark long hair, tall, thin and has either brown or green eyes. So is that Audrina Patridge? The girl was on a tv show with LC's character Jane. They were best friends. If Scarlett isn't Audrina Patridge do you have any idea who the character is supposed to be in real life?? Please don't answer this question if you have no clue what the answer is!