Circus to Showgirl, Sexy Stardom to a T.
Also, the BTS peek was the perfect touch. I LOVED it. Everything about this industry is caught in this tug of war between adorable-sweet and sexy-serious, but the BTS showed very easily that neither category is exclusive of the other, nor of any other sort of theme. All in all, this was a GREAT music video!
I would have liked to see a story, though honestly this song is probably better off without one. This way, the focus is on the girls and their glamour and the smootheness of the song and it's interactions with the MV's reality rather than on a complicated back story or the song's barely there shape. The song itself isn't terribly well suited for a story so choosing to forgo one is actually a wise decision.