The 31-year-old singer posted two photos from the set of her upcoming video "Work Bitch" over the weekend.
"Gonna get my tan on in the desert in between shots on the #WorkBitch set today. It's HOT out here people!!!! #desert #heatwave #WorkBitchDay2," Spears captioned a photo of herself looking slim in a blue bathing suit.
The previous day the pop star posted another photo of the set in which she is shown through a camera viewfinder in a yellow and black bustier and long black gloves.