I believe there's a mistranslation here:
SUTAIRU nante, ki ni shinai wa futoccho datte datte datte, kawaii mon
Currently tled as:
I don't care about my (fashion) style I think I'm cute being a bit chubby
I don't care about my figure I think I'm cute being a bit chubby
スタイル (n) (1) style; (2) (female) figure; <-- based on the context, the 2nd defintion applies.