Singer Lee Chae Yeon's new song "KNOCK" is rapidly rising on the music charts. 

Lee Chae Yeon, who released her 2nd mini-album "Over The Moon" on the 12th of last month, is showing her terrifying potential by stepping on the 21st place on the MelOn Top 100 chart as of 9:00 am on May 10th with the title song "KNOCK."