Ironically, we can't show you the photo Sia tweeted here, as it's the property of the photographer (yes, a photo of Sia naked is not actually Sia's own property, and may in fact see her slugged with a hefty bill - crazy, huh?). But it shows the singer from behind, stnading on a balcony naked, and is apparently taken by a photographer from quite some distance away and without her knowledge.
The photographer also promises an "additional 14 images" to whoever purchases the nude photos.
While the publicity-shy singer usually avoids revealing her face in public, it seems she had few qualms about showing off her butt today. And the overwhelming response to her tweet from fans: THAT'S how you respond to the paparazzi's attempts to profit from a creepy privacy invasion.
