I shouldn't call this a look-a-like either, but I don't know how else I could put it. What do a female Korean idol group and a male Japanese group have in common? One thing is the backgroud in one of their MVs.
In NEWS' Akaku Moyuru Taiyou/紅く燃ゆる太陽/Burning Red Sun music video there is the polka dot background where they play around in.
In 소녀시대's Kissing You MV is the same, if not, similar polka dot background.