Kelly Osbourne's weight loss is due to a thyroid problem, which she refuses to get treatment for, rather than a healthy diet.

The singer is scared that if she seeks treatment for her condition she will regain her weight.

"Forget all that healthy-eating bulls**t, Kelly said. "I have a thyroid problem which means I s*** all the time. My doctors want me to start taking steroids for it but f**k that. I don't want to put all the weight back on again," she told the Daily Mirror.