An owner of a Fuji apple orchard printed up custom stickers of iPhones and the Apple logo. He then put the stickers on his Fuji apples while they were still young and on the trees.

A month later after the apples had matured, he removed the stickers. As you can see the lack of sun reaching the apple cause them to keep the stickers original design.

http://www.weirdasianews.com/2008/12/04/apples-apples-talk-geek-fruit/