Figure Behind Ghost Picture

We recently received this interesting ghost picture which has a ghostly-looking figure behind the girls. This cell phone figure is said to have looked like their mom. You decide...

"This picture was sent to me from a friend of mine. She knows the three girls in the photo. Their mother died a year before the picture was taken."

Is it a ghostly figure or was it Photoshopped in?  The photo seems in general to have an "art" look, but this could be due to it being altered to mask the faces and being saved in a lower quality, before we received it.  So, you decide...