The pop princess shared two racy shots as she continues to enjoy her newfound freedom after the end of her 13-year conservatorship.
The images showed the star in nothing but long white socks and a necklace, with heart and flower emojis protecting her modesty.
"Free woman energy has never felt better," she wrote.
The star, 40, had been under the conservatorship since 2008 and had called it “demoralising and degrading”.
She was officially freed from the guardianship in November last year and since then has been opening up to her followers on social media about what her life has been like since them.
Earlier this week, the mum-of-two revealed she had enjoyed a glass of red wine for the first time in 13 years.
After sharing a video showing her dancing to a Madonna song, she wrote on Instagram: “I’m sure it looks weird me dancing to @madonna so much… I see it… it’s like I’m not trying as much like I’m INDULGING... well that’s exactly what her music does to me!!!
“I mean I had my first glass of red wine last weekend!!! I’ve waited 13 years… that’s long enough!!!”
Another new post shows Spears – who is engaged to actor Sam Asghari - posing in a pink bikini, heels and shades.
“This is my first high waisted bathing suit ever… my fiancé likes it but I’m not sure," she told her followers.