I dunno man, I'm not trying to knock the chick, its just an observation... That said, she used to be obsessed with crossfit, and was clearly in a gym a lot more when she was fighting, which she doesn't need to as much now.
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I personally prefer chicks with some meat on them... And chicks with her body type gain weight even if they glance at fast food... And then there's also the fact that big booty sells these days.
I don't think its a stretch to say she has put on a few pounds lately.