Bit Karen Carpenterish, who I like as is well-documented. So there was South African pop before this, who'd have thought ...
She (Glenys Lynne) predates Karen Carpenter. She's Afrikaans and was singing before joining with the band, who are of English origin. She later married the bassist.
They still do a few shows a year.
It was a very strange song to be such a big international hit.