Taiwanese singer Angela Chang gave fans a scare when she suddenly fell ill during her concert on Aug 23. The 44-year-old, who is currently on her Play Master concert tour, held two shows in Chengdu on Aug 22 and 23. Videos of the incident circulating on social media show Angela appearing slightly uncomfortable while performing her song Doesn't Hurt (2007), as she tugged at her collar and skirt hem. In another clip, staff members are seen helping Angela during a costume change. One of them is seen measuring her blood pressure while another fits her with a nasal cannula, a plastic tube used to deliver supplemental oxygen through the nose….