Adele reveals incredible weightloss transformation at Drake's birthday

Adele has undergone an incredible transformation of late, losing an incredible three stone in just six months after overhauling her lifestyle.

And the Someone Like You hitmaker, 31, proudly showed off her weight loss as she attended Drake's birthday party in Hollywood last week, looking stunning in a low-cut gown.

She used to be proud to be one of the few curvy celebrities around, saying in 2009 that she didn't care about how she looks.

The singer said at the time: "I have never been insecure, ever, about how I look. My mum told me only ever to do things for myself, not for others."

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Adele first started improving her diet after the birth of her son Angelo in 2012.

For the sake of her voice, she ditched the 10 cups of sugary tea she used to drink each day and cut out alcohol, cigarettes, caffeine all "spicy, citrusy, and tangy" foods.

"It's f***ing boring, but I don't think you take your voice seriously until you've an accident," she told Australia's 60 Minutes of her 2011 vocal hemorrhage.

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"I'm frightened all the time I'm going to damage my voice," she admitted.

In 2015 she said she thought she'd been successful because she had a "relatable" figure.

She told Rolling Stone: "Would I show my body off if I was thinner? Probably not, because my body is mine. But sometimes I'm curious to know if I would have been as successful if I wasn't plus-size. I think I remind everyone of themselves."

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But the following year she was starting to go to the gym more, admitting she wanted to be in shape for her tour following the release of most recent album 25.

By 2017 she was believed to have lost more than two stone, reportedly due to The Sirtfood Diet, which sees slimmers fill up on plant-based foods like kale, buckwheat, green tea and tumeric.

The foods are known as sirtuin activators, and are said to control the way the body processes fat and sugar and regulate the appetite in the process.

Green tea and cocoa powder are also on the menu, along with red wine and cheese.

"The Sirtfood Diet is all about losing weight and feeling fantastic through eating great-tasting food," a source told the Daily Mail.

“I mainly moan. I’m not, like, skipping to the f-cking gym. I don’t enjoy it," she told Rolling Stone in 2016.

"I do like doing weights. I don’t like looking in the mirror. Blood vessels burst on my face really easily, so I’m so conscious when I’m lifting weights not to let them burst in my face. And if I don’t tour, you’ll catch me back down at the Chinese!”

"After Adele started working out, she never looked back," the source told PEOPLE.

They added: "She was instantly a changed person with a different mindset."

Adele reportedly has regular personal trainer sessions and pilate classes, as well as enjoying a Stairmaster-like class called Rise Nation.