Star news hired a research firm Gallup Korea and asked this question to 1052 Koreans between ages 16 to 69.
#1-2 tied at 42%. SNSD and BP.
#3 NJ 25%
#4 Wonder girls 21%
#5 Twice 13%
#6 2NE1 10%
#7 IVE 7%
#8-10 Aespa, Kara, Red Velvet 5%
#11-13 APINK, MAMAMOO, SISTARS 4%
#14-15 T-ARA, (G)-IDLE 3%
#16-17 Brown-eyed girls, 4Minute 2%
#18-20 f(x), Miss A, Secret (1%)
"This survey, which examines the entertainment industry since the 2000s, presents 20 candidates for each category based on major charts and awards, influence during online and offline activities, and opinions from reporters in related fields, and asks the participants to choose two. Those who are not included in the list can be freely written in the “Other” column. The data collection method is an online survey, and the sampling error is ±3.0% points at a 95% confidence level, and the weighting is based on the resident registration population statistics of the Ministry of the Interior and Safety as of the end of July this year."