In the picture, the singer is seen wearing thigh-high designer boots and a thong.
The 'Diamonds' hitmaker shared a photo of herself wearing new custom-made Prada thigh-high boots as she modelled them in her bathroom in a provocative pose, reported the New York Times.
"Got a tip toeing on my marble floor'!!! Sick custom Prada boots! Miuccia you Rule!!! Thanks you," she wrote.
Rihanna, 25, was in London launching her debut fashion line for River Island.