Fans are currently abuzz with concern as Chinese fans have reported that f(x) memberKrystal fainted on stage during the 'SMTOWN LIVE WORLD TOUR IV in SHANGHAI'.

According to numerous reports from users on Chinese SNS site weibo, Krystal fainted when going the down the stage step after f(x)'s "Red Light" performance. Pictures of the incident shown below from weibo user real_Lainka61 are currently circulating around the internet.

SM Entertainment has yet release an official statement on the issue.