I think I've found the most extreme photoshop makeover ever.
Photoshop make overs arise when a photo is edited to enhance or alter features of the photo. Most commonly, a model's features will be enhanced.
In the example I found, the model's ears are too perky. Her arms are too straight. There is not a blemish on her body. And she would hardly be smiling after what she had been through. Naturally, she was a very attractive specimen before the photoshop changes.
See the photo below and let me know if you too think it has been altered or enhanced.