With the warmer weather, tis the season for celebrities sharing sexy bikini shots on Instagram.
This time, the 24-year-old "Cool for the Summer" singer donned a perilously low-cut blue one-piece. We are not sure who manufactures this exceedingly low-riding swimsuit, but we thank them.
And we thank Demi too, for her indefatigable efforts to make Instagram smoking hot again. See what we mean with eight more of her hottest shots, below.