我唱的不够动人你别皱眉
[wŏ chàng de bù gòu dòng rén nĭ bié zhòu méi]
Expresses an apology towards the receiver for underwhelming performance of singing, it also carries a wish that no matter how badly the singer performed, he hopes his audience could still appreciate his efforts rather than criticizing or showing dissatisfaction through facial expressions such as frowning.