I didn't see this posted here yet but there is a singer who is live-retouched during the course of her music video.

Interesting concept to watch.

The most relevant comment on this was along the lines of what I was thinking, as obviously this is not Photoshop (which most of the commenters mentioned): "Er, that's not PS. It just a gradual reveal of the subject with better lighting/makeup/hair using a fake interface."