And, in one scene of the video, the 27 year old appeared totally naked on screen.
She seems to be unclothed with geometric lines of lights across her body, although some fans have suggested she is wearing a nude-coloured bodysuit.
Swift posted three short clips on her Instagram page, and within one hour they had been viewed more than 2.5 million times in total.
The full video for Ready For It is scheduled to be released on Thursday (October 26).
She teams this with her trademark golden curls and dark smoky eye makeup.
Taylor Swift's latest look leaves little to the imagination.
Though the 27-year-old is nearly definitely not naked IRL, the bodysuit she's wearing matches her skin tone perfectly and leaves little to the imagination. The possibilities of what new Taylor is up to are truly endless.
Taylor Swift looks sensational in her sexiest photos ever. "She's taking back that narrative too".
The song returns Swift to Shellback and Max Martin, the Swedish producers and writers who helped design much of her pop crossover album "1989".
In the film, a follow-up to Look What You Made Me Do, she is covered with freaky black markings that make her look like an android Barbie doll.