Wǒ páimài pái le bàntiān, zhōngyú lún dào wǒ chàng le.
I was queued up for ages - finally my turn to sing.
Tips
usage
麦 = 麦克风 (microphone). Used at KTV for waiting your turn to sing, and in voice-chat apps (QQ 语音房, 连麦) where hosts moderate a mic queue. Opposite of 麦霸 (mic hog).