Swapped

Actress Patricia Stokes was a very successful actress, who hired a look alike to exit buildings and parties before her so that she didn't always have these paparazzi attacks. When she got pregnant she stopped doing this though, for she was ecstatic, and wanted to show the world how happy she was to be pregnant and soon have her baby!
With only two years of age though, her daughter Leora started showing signs of unease, and even anxiety...
The doctors blamed it on all of the attention. The flashing cameras, all of the critique a normal child wouldn't have gotten, and so on. They said she was getting too stressed for her age and that something had to change.
Patricia remembered how she did it before the pregnancy, and decided to hire a toddler look alike.
Thirteen years later, someone realizes that Patricia may have kept the wrong kid when she fired the look alike twelve years ago...