WHAT! That is SO funny that you thought that was me! My brother-in-law posted that very same picture on my facebook (you can see it in my pictures section) because he thought that was me too! When I first saw it, I thought, "oh. When did someone take a picture of me in a movie theater?" For the record, I have never seen Paranormal Activity 2.
I didn't think it was actually you, but she looks more like your sister than I do.