http://shaunk566.blogspot.com/background looks real but the ghost looks fake
http://pballadavid.blogspot.com i would say that the light exposure is maybe made by photoshop
http://gatomate-skater.blogspot.com/ the order of the faces and the mirror effect is done by photoshop
http://rachelphotoj.blogspot.com/ the overdupting effect on the face is made by photoshop
http://helenapippins.blogspot.com/ the jacket is done by photshop and the background too