Wow, you know a lot of girl groups, more than me:ㅇ If you are Korean, you will know The reason why there are no mentioned groups is that as recently as the early 2000s, idols and dance groups were separated. And if you include too minor singers, the video gets too long. And this video also treats more than three people as a group, with plans to make a duo version. (I don't know if it's going to be this year or next year.) So 'big mama' and 'as one' are famous, but I didn't include them in the video.