1) Start by getting your images & pasting them in an open photoshop document. I’ll be using these.
2) Now, get the eraser tool & depending on the size of the images being blended set your eraser size rather large & with a hardness of 0%. [always 0% so it blends good ]
3) Now, with the eraser & on the designated layer you wish to blend, erase the sides of the picture so it looks like this. See how I erased Lady Gaga’s picture in the middle?
4) Now you can continue to blend & edit to your liking. This is what I did.
Tutorial on how to edit like this coming soon?