Face replacement (without using AI)

The client had an idea to prank her friends, as if she had been with them for a certain period of time, and they didn't even notice. For this, she needed to replace the face in the photos she provided. For the replacement, she provided the original files of her selfies. Previously, the client requested that the photos be taken without the use of AI tools. The work was done using Photoshop. The face was replaced and the image was upscaled.