I can't comment on BoA because I never like her music, so I never watch her videos and stuff.
Technically I will say Namie wins over kuu, but kuu shows a strong emotion towards her dances tho. I won't really say Namie is getting bad. What she did in rock steady/what a feeling/sexy girl are still considerably good. Kuu, on the other hand, slips up so much after FREAKY. I really miss her old dances like Shake It, Butterfly, Candy, Juicy, etc.
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