If you listen to the original studio version, it's a higher key. They took it down because he is obviously having vocal problems. Obviously. And Suzanne Vega is the woman. She's there because the little "dih-dih-dih" part is from her great 80s album "Solitude Standing". You should listen to it. It sounds WAY better than this performance.
Why are these people laughing at Christians? Oh yea...it's open season on Christians. The way Americans disrespect Christ and the church and yet bring more "honor and light" to non-Christian entities is nothing short of anti-Christ.