4minute's HyunA was once again surrounded by lip-sync issues.

In KBS 'Music Festival' aired on the 29th, HyunA performed 'Trouble Maker' with BEAST's Jang Hyun Seung. On this day, she showed a great performance, but the big difference between her lip movements and the song brought suspicions to the viewers. It was clear to everyone that Jang Hyun Seung was singing live with his superior live vocal skills, but HyunA's voice was much softer in comparison. The viewers said, "Compared to Jang Hyun Seung's amazing vocal skills, HyunA's voice couldn't be heard that well, showing lack of sincerity in the stage," accusing HyunA of lip-sync.

HyunA's agency Cube Entertainment said, "The stage for the 28th was supposed to be focused on the performance, so it was a live stage with a soft AR background music. But there was a big difference in the two's sound. Jang Hyun Seung used a hand mic so his voice was heard well, but HyunA's voice couldn't be heard because of technical issues. If it was lip sync, HyunA's voice would have been heard well."

HyunA had been accused of lip-syncing in the past, in April.

Photo Credit: KBS