Love the song, even I started to sing Physical Physical instead of Prisoner Prisoner many times, but again the same old story with songs shorter than 3 minutes. 2:40 is simply not enough time to "explore" the sound and with the constant repeating the song gets overwhelming and then annoying very soon.
The song basically ends with the bridge. There should be set of choruses at the end with a certain musical graduation.
Video is OK, I wish Mylie would concentrate more on glam rock disco image like in Midnight Sky. Her licking phase is not interesting anymore.
But song is Bop !