Bulimia can definitely do this to teeth and worse. I just read about 5 articles on it. I bet he had a whole bunch of work done. I've noticed a few other things, especially about his smile and lips that could mean some little bit of plastic surgery was done or maybe not. Especially noticeable to me directly under the nasal septum, called the philtrum. That space directly between the nose and the upper lip. I am super observant of faces, probably because I was at one time a portrait artist and also a photo retouchist for a photography studio and did all the work in oils, by hand.
I don't want to pick on him cause I adore him so I am not going to nit pick at his face after this. If he did have work done, why not? I would if I were him and had that kind of money. Not a doubt in my mind, I'd do it.