Stuff like 'teeth enhancement' aren't anything big, and it's extremely common. Hey, Tsuji had her teeth fixed too! Also, there are such as thing as clear braces, so it can't be seen, or even just the use of retainers when at home.
As for plastic surgery, well first off, whether she
has had them or not it doesn't make her any less better. She's still an amazing performer and person. I, personally, believe she hasn't had anything done. Even to her breasts, I believe it's all natural. And trust me, coming from a girl as well, the right bra and use of padding can do WONDERS. It can even make an A-cup person look like she's got some breasts. There's also the right type of lighting, and even make-up can help one's chest look more enhanced.
And yes, growing up can make someone change quite a bit. Usually, the face shape tends to get more narrower, so do features like the nose.
Are we forgetting this is the gossip thread?
Yes, but it's also the place to clear up or even just try to clarify rumours sometimes and try to see whether they're true or not
It's a place of discussion, and speculation.