Several of the pictures show Spears posing nude, with her breasts covered by red flowers.
The 25 year-old singer, who is also wearing a hat and sunglasses in the pictures, reportedly posed for the pictures while visiting a botanic garden with friends, according to Us Weekly.
Earlier this week, Spears performed for 14 minutes on the stage of the San Diego House of Blues. Spears has not performed live since June of 2004, when her show ended early after she injured her knee.