Mystery songstress who refuses to reveal identity after being stalked earlier in life postpones event amid public concerns over lip-synching

A 20-year-old mask-wearing singer in China who has more than 22 million followers on social media and is to hold a concert with her face concealed has triggered controversy online.

The singer, from Shanxi province in northern China, who uses the alias “wangzaixiaoqiao” on a leading social media platform, has never shown her face in public, Chao News reported.

She has attracted attention after she began releasing videos of herself singing a cappella five years ago.

Fans have said that her voice has been “kissed by an angel.”