“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.
“I’m frightened all the time I’m going to damage my voice,” she admitted.
In 2016 she shed yet more weight ahead of her tour in a bid to “get some stamina”.
And by 2017 she was believed to have lost more than two stone reportedly due to implementing a second change – The Sirtfood Diet.
The food programme 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.
“It’s based on extensive research into the power of key plant foods, which when added to our diet turn on fat burning and improve wellbeing.”
In a bid to improve her health from all angles, the singer has also made some changes to her fitness regime.