Kelly Osbourne has been in the public eye since her early teens, and for much of that time, she was subjected to cruel and unwarranted criticism about her weight.
Despite the fact that she's trimmed down tremendously in the past few years, Osbourne was subjected to "fat rehab" rumors as recently as last April.
While Kelly has never been shy about telling her critics where to shove it, she's clearly a firm believer that living well is the best revenge. In fact, these days she's firm in more ways than one:
Believe it or not, that's Kelly wearing a thong in the above photo and the 29-year-old fashion designer is clearly in the best shape of her life.
In what could be regarded as a wee bit of hypocrisy, Kelly has openly criticized the weight fluctuations of other stars in the past. (The Kelly Osbourne vs. Christina Aguilera feud remains the stuff of legend.)
But by posting the above photo for all the world to see, Kelly is clearly putting her money where her butt is.
Kelly split from fiance Matthew Mosshart earlier this year and has been romantically linked with several semi-famous men in the months since.
The guy pantsing her in the photo is Kelly's hairstylist Ryan Randall.
Naturally, Kelly captioned the shot with, "It's not a "FullMoon," but it feels like one!"