there is a discography mention for a Helen Alpert doing backing vocals on a 1989 recording, not in the folk music genre
https://www.discogs.com/release/616638-Los-Sucios-Sucias-Que-Ricas-Son

The pseudonym "June Bugg" seems familiar to me, so I suppose I heard a recording of her at some point.

Is this photo of June Bugg really her (given that she is still a "mystery" to us)> https://secondhandsongs.com/artist/173959