K.A.R.D, Jonghyun, Changsub + More: What Is the Best K-Pop Release of the Day?K.A.R.D, Jonghyun, Changsub + More: What Is the Best K-Pop Release of the Day?From K.A.R.D's 'Rumor' to Snuper's 'Back:Hug' to Changsub's 'At The End,' which release is your favorite?PopCrush StaffPopCrush Staff