It's not just famous supermodels that get retouched sometimes it the retouchers job to simply make everything a sunny day (see below).
Images are very often in need of some photo-retouching or color-correction. Retouching is most often used to remove dust and artifacts, to correct deficiencies in lighting or pose or to set a level of polish by ironing out any blemishes to skin or other surfaces.
Some images require a lot more than just removing blemishes or dust from the file. We do montage, compositing or original artwork creation and as you can see we can make it a sunny day.
To see a portfolio of retouching work click here.