The singer posted an image of herself seemingly filming the promo clip, alongside a caption of what appears to be lyrics, reported Ace Showbiz.
Britney has previously teased 'Pretty Girls' with another tweet of dancers in a rehearsal studio.
Another image of the singer in the car with Iggy Azalea has also been circulating.
Azalea has already spoken out about the single, saying "it's a true duet" after she rewrote some of the track.
'Pretty Girls' is expected to be released in May.