These are the audio files for Bootylicious. Download the file for your part, plus the file that is just called Bootylicious, which has all parts.
An MP3 player should recognise the files as being part of an album called MCC Christmas 13 with artist Medina Community Choir.
In terms of instruments used, tops are piano, middles violin and bottoms bassoon. The sound is also panned in the stereo field, so tops are fully on the right side; middles equally balanced; and basses fully on the left side.