He's had a hair transplant and some dental work for sure. Some of the wrinkles have been smoothed down but he has good genetics to go with it. The Boss has deffo had some work, but it's subtle work and looks pretty good regardless. All Mozzy would have to do is drop 25 pounds, recalibrate the hair and whiten the ole knashers and he'd be 'Boss Ready' in no time.
i think people are a little too overeager to say that celebrities have had work done, which is why, like gregor samsa, i tend to be wary of that. how many supposed "before and after" photos do we have to see of actresses purported to have had nose jobs or whatnot, and it's like "guys, it's the same f***ing nose". lighting, time of day, water retention, allergies etc can all dramatically alter the way a person looks so it's not surprise that a person doesnt look exactly the same from one picture to the next. i dont even look the same in one corner of the room to the next.
still, i dont think theres anything wrong if a person HAS had work done, and theres certainly nothing wrong with a little touch up in older age. didnt moz get fillers though? there was that one picture of him a while back looking downright jocelyn wildensteinish, and it did NOT look good. clearly does NOT go to the same plastic surgeon as the boss.