SISTAR's Hyorin reportedly checked into the hospital after breaking away from the middle of filming for KBS's "Immortal Song 2." Right before she was about to compete, she realized that her throat condition wasn't as good as it could be, leading her to make a quick trip to the hospital for a check-up. PD Kwon Jae Young revealed, "The hospital said that there was something wrong with her vocal cords, but fortunately, it's not anything severe." He continued, "They said Hyorin will have no problem singing, so she did returned to the stage and completed her song with no further problems." Be sure to check out the pilot episode on June 4th! Source� + Photos: Star News via Naver