Now this is how to use Photoshop to wonderful effect!
Chinese media artist Celine Liu (also known as Silin) has inserted herself into old photos of many famous people. It is done very skillfully, and in many cases you would be happy to believe that the photos are genuine. In the shot above, she is standing next to the famous artist Frida Kahlo. In other constructions, we can see her sitting next to Marylin Monroe, standing close to Mao Tse-tung, and riding in the car with JFK and Jackie Kennedy before his assassination.
Here’s a link to many more of her wonderful images.