High key, shot outdoors? what!

Some of the remarks about high key are used to cover up overexposure. I have never even thought about an outdoor shot being high key. If you are shooting outdoors, there is only one exposure, the correct one. If shooting indoors in a studio environment, you can shoot high key very well, as all is controlled.

If there is such a thing as outdoor high key, would someone please post some. I can't believe it is possible. If you can't control the subject and the background exposure separately, how would you do it?