Here are the top 5 best-selling kpop girl groups in South Korean history (physical sales) from Gaon Chart.
5. RED VELVET

The vocal queens of kpop, the talented ladies of RV, have sold over 1,722,780 physical sales on Gaon.
4. IZ*ONE

The 4th generation leaders have sold over 2,078,371 physical sales on Gaon.
3. GIRLS' GENERATION

The nation's girl group and legends of kpop music have sold over 2,366,447 physical sales on Gaon.
2. BLACKPINK

The biggest girl group in the world, the global super girl group, has sold over 2,404,852 physical sales on Gaon.
1. TWICE

What's crazy is put into context Girls Generation sold as much as the others without being a mainstream name in the west. Imagine what it would be like if they had BlackPink levels of YouTube hype a decade ago when Kpop was just "some foreign music" you get laughed at for listening to.
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