I do not think it is pre recorded, someones enhanced the live audio. This is what they do in those talent shows in USA. They tried to do it on the UK X Factor, the British public did want anything enhanced, you either can sing well or not. This is just sad, but it seems Americans except these things. Some of these comments above making a judgement on enhanced audio. People are easily pleased. Cannot make any judgement on this, it is one of those things you watch it & just forget about it until actually hear them sing it live without any enhancement to the audio.