I think this might be a fake...

but here is a way gross supposedly unretouched photo of Gwen Stefani. This had been posted on several blogs linking each other rather than the source, so I don't know if it's real or not. The thing that makes it seem less feasible to me are those big bumps on her face, those would be pretty hard to hide with make-up. Whatever, draw your own conclusions. There are a lot of sites that do the side by side of their retouching on famous people. I guess I'm going to go for this is real.