In this photoshop photo effect tutorial from Tutorials Junction you will learn how to create this somewhat popular torn paper effect. The effect is actually very simple to create, compared to how good it looks. All you have to do is apply some layers masks and use good quality torn paper brushes.
You will need two portrait photos with slightly different poses to get the best effect. The author uses one black and white photo and another one in color to give more impact to the final image. Download the frontmost image here, the back image here, and the torn paper brushes here.