Another reason for sudden "growth" on some sites is the recent use of fisheye, or wide angle lenses coupled with models being shot very close to the lens.
Exactly, this is the technique (sort of fraud) that some sites are using.
Or if the lenses are not enough they invite the girls some months before to make Saline solutions.
Is full of pictures example of pre and post "operation".
The only REAL cases where you see a girl growing in boobs is after a pregnancy (and she can not loose the boobs size in some rare cases) and after getting weight and loosing weight, like in the case of Micky, that I mentioned above
She has a ratio body/breasts that is one of the best actually.