Kelly Osbourne unveils 38kg weight-loss transformation during 36th birthday celebrations

Kelly Osbourne has unveiled her complete body transformation in a birthday bash thrown in her honour.

The British reality star, who recently lost 38kg, arrived at the lavish bash held at Hollywood Japanese restaurant Yamashiro to ring in her 36th birthday earlier this week.

But the event wasn't all about Osbourne — the politically-aware daughter of Sharon and Ozzy Osbourne made sure to shift the attention towards next week US election by wearing a black face mask that had the words 'vote' emblazoned in a rainbow of colours.

In August, the singer and actress revealed she underwent gastric sleeve weight loss surgery two years ago to help kick start her weight loss — and she's thrilled with her results.

"I don't give a f--k what anyone has to say. I did it, I'm proud of it, they can suck s--t," she said during an interview on the Hollywood Raw with Dax Holt and Adam Glyn podcast. "I did the gastric sleeve. All it does is change the shape of your stomach. I got that almost two years ago. I will never, ever, ever lie about it ever. It is the best thing I have ever done."

Since her surgery, she has overhauled her lifestyle and now she follows a healthy diet and workout regularly to help maximise the results of her surgery. 

"If you don't work out and you don't eat right, you gain weight," she said on the podcast. "All it does is move you in the right direction. So, anyone who's thinking of doing something like this, really think about that."