Since their debut in 2007, the group has emerged as one of the leading acts in the Korean music scene. They plan to release an album in August to mark their 10th anniversary.
Now-disbanded groups 2NE1 and Wonder Girls ranked second and third on the list. Brown Eyed Girls were fourth, followed by After School, Kara, who enjoyed huge popularity in Japan and have since disbanded, f(x), 4minute (also disbanded), A Pink and miss A.
Source : http://english.chosun.com/site/data/html_dir/2017/07/17/2017071701339.html