Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A response to the last review

The reason the music doesn't sound like the song you're used to is because the melody is in the singing of the song. Your probably getting the correct instrumental, you're just not singing and so that is why it sounds different to you. You're supposed to sing along, not just listen to the instrumental version of the song. That's why the cd itself is called a sing along.