A PERVERT has been sexually harassing singer Yuna on Instagram. Kosmo! Reported that the perpetrator had been making sexual comments on the singer's Instragam. Yuna tweeted on the harassment on her official Twitter account. In the tweets, she urged Instagram to help her as she had blocked the stalker 10 times. "He keeps coming back with new accounts," she tweeted. When contacted by Kosmo!, her manager said Yuna, whose full name is Yunalis Zarai, refused to comment on the issue for safety reasons.