This is my Facebook Friend Project from 2014 to present.
I collected fb profile pictures from my friends who are using Facebook, the rules are following:
1.send me one personal photo included complete face
2.choose one facial feacture to be kept (normally mouth, eyes, or nose)
3.I would draw them digitally
4.as soon as reciving my work, change it into his/her profile pictures for at least 3 months
5.unable to ask for a modification
This project is still progressing, and there are at least 100 friends involved.