Who is the Nation's Kpop girl group among big 3 - K Drama center

The title of Nation's Kpop girl group belongs to Twice. But its' for now. With the introduction of a whole new generation in Kpop led by G Idol, Luna, Itsy, and SM entertainment's new girl group AESPA that means the crown of Nation's Kpop girl group could soon be up for grabs.
With all the Kpop girl groups out there who really is the Nation's Kpop girl group? Red Velvet - The group from SM entertainment where Girls Generation the first nation's Kpop girl group was from. Twi

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