吉他演唱表演用英语可以称作 "guitar singing performance"。 "Guitar" 是英语中吉他的说法，"singing" 是唱歌的意思，"performance" 指演出或表演。例如：

The singer gave a beautiful guitar singing performance at the concert last night.
这位歌手昨晚在音乐会上表演了一场美妙的吉他演唱。
The guitar singing performance was the highpght of the evening.
吉他演唱是晚上演出的亮点。

希望这对您有帮助。