The pop superstar, 31, was seen leaving a dance studio in Calabasas, Los Angeles, wearing a colour co-ordinated outfit of purple jogging bottoms, a low-cut purple T-shirt and a purple hoody.
She had also scraped her blonde hair up into a ponytail and appeared to be wearing little, if any, make-up, while making a quick dash to her car outside.
Britney has been frequently pictured at rehearsals over the past few weeks, which were assumed to be for her upcoming residency spot in Las Vegas. However, a mysterious tweet written by the songstress yesterday (28 August) has left fans thinking that she could have something even better in store.
She tweeted: "Taking a quick break to say hi to all my tweeps :) Rehearsing for something top secret happening next week... #WERK"
Although Britney made sure to keep her lips sealed on what exactly this "top secret" project could be, she may have given a little clue away to one fan.
When one Twitter follower asked whether she would be filming a video for her new single, Britney simply replied with a wink. Does this mean she is gearing up for an attention-grabbing visual to accompany her highly anticipated new music?
For now we'll have to keep guessing. But at least we only have to wait until next week!
What do you think Britney's "top secret" project could be? Let us know below, as the best comment each week wins £50!
Britney Spears through the years in pictures:
Copyright: Britney Spears / VEVO