Attach a person's head to another person's body.

I need the head of 3 people to be attached to another persons' body. I want this to look natural. That it won't be obvious that the heads were only attached. I will be providing the images of the body. For the head, you can google the persons that I want and just choose a head there. You may also alter the body so it can look more natural with the head. This is a really easy project for the experts. Budget: 30$