Original song from back in 1995 when Pamela was living in British Columbia. The sheetmusic is in the old Mac Chicago font, which would suffice to date it even if she hadn’t added “© August 1995”. It has melody, bass line and chords, with notes pertaining to percussion and more. It’s a working copy though.
The song was also on a cassette marked “Copywriting tape” so I’ve made a digital copy which you can hear below. The strict tempo and rhythm, as well as the sounds, suggest that she was playing with a friend’s synthesizer. I did the same sort of thing at that time, and it sounds familiar. I never had Pam’s vocal chops, however.