Before 'Grease', ONJ was essentially a wholesome country singer - albeit an Aussie one - who typified a squeaky clean image. What came after 'Grease' was an exploration of the theme of her own transformation into a sparkling, shining vixen. This period of ONJ's career could have been called 'Totally Pink'... because she wore a lot of it. (In these tour photos, her outfit looks lavender - but it was actually very pink.) She still maintained her clean image, whatever she did and wore. Because despite any effort to play up a sexy image, who she is within shines through and takes that to another level of a more goddess-like appeal. Not many people can rock pink spandex with a sparkly pink top and look like an exquisite Barbie doll (in the most authentic sense.) Of course, many have tried and failed.
So when I watch an ONJ performance circa 1978, I marvel at what it might have been like to be her - at that specific point in time, just before she 'peaked' - while being acutely aware there's never been anyone quite like her since.