It was Newton who once said that for every action, there is an equal and opposite reaction. Therefore, because the image of an elderly Justin Bieber with a young man's body exists, so does this depiction of Pippi Longstocking as an older woman with a youthful face. If it hurts your eyes, blame physics.
Perhaps this picture is telling us that no matter how old we get, we still feel the same way inside as we did when we were young. Or perhaps it's saying that when we care about someone, they always look the same way to us, no matter how much time passes. Think of someone you love but haven't seen for a while. Are you imagining them as they are now? Or are you seeing them as they were years ago, when you first met? Strange, isn't it?