These are the audio files for I’ve Had the Time of My Life. Download the file for your part, plus the file that is just called I’ve Had the Time of My Life, which has all parts.
An MP3 player should recognise the files as being part of an album called MCC July 2013.
In terms of instruments used, the file with all parts has all voice parts using a voice synth, with the accompanying piano part. In the individual parts, all the other singing parts are silent, your part is played as a saxophone (if soprano, alto or tenor) or a bassoon (if bass) and the piano is quiet(ish).