Would be interesting. But because of the old data transfer server load stuffs issue which already disallows us from various things like dedicated glamour slots, I can only imagine this happening if your friends' appearances are saved clientside. In which case, you could get some funny results.
Like maybe the last time you've seen someone, they weren't even the same race or gender, or even had the same name.

I can only imagine that some people haven't seen me since someone's wedding: