How to get Jennifer Aniston's nose

This request may or may not be unreasonable.  If you want the exact nose, then yes, this is an unreasonable request.  However, if you say that you like the size and shape of her nose and that you would like your nose to be like Jennifer Aniston's, then you may be able to work with your plastic surgeon.  Of course, there is no guarantee that you will get the exact same nose, but bringing in pictures of things that you like gives your plastic surgeon an better idea of your aesthetic goals.  Good luck!