I don't think Kylie is underrated. Most of the users here are just too young or not interested enough to check out her old stuff. It's a fact that she's a legend and icon. She's just not always on people's radar but when there's a new release ahead everyone loves It and only has nice words for her.
Another fact is, that "Get outta my way" is probably one of the most perfect pop-songs ever. The structure, melody, theme, emotion, lyrics, drama and the climax are on point. You just have to smile when you hear It. Every damn time. And in my case, that are A LOT of times.
Truly addictive masterpiece you can't escape from.