if you check her twitter you can clearly see that she is flat chested
Flat chested is a bit of an exaggeration but they are much smaller now. I actually prefer this size.
https://twitter.com/AmyAnderssen1/status/608669747886948352 
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"I always find it funny when chicks say that, because I hate sex but I still have it. Afterwards, I hate myself, I feel awful, dirty and sometimes cry. But it's worth it, if only to feel a little human every now and then."