Rumour has it that pop singer Adele has lost weight using a diet that allows red wine and chocolate.

The singer, 31, first debuted her slimmer figure at Drake’s birthday bash last year. She continued to drop pounds over the holidays, even worrying some onlookers that she was too thin in recent paparazzi pictures.

The “Hello” star reportedly lost nearly 50 pounds after hiring a personal trainer and following the sirtfood diet, a meal plan she was also linked to after she lost weight in 2016.

And Adele’s not the only one on board with the buzzy diet, which focuses on foods that regulate one’s metabolism. The Duchess of Cambridge’s sister Pippa Middleton is also reportedly a fan, and the eating plan was the seventh-most-searched diet on Google in 2019.

The sirtfood diet originated in the UK from nutritionists Aidan Goggins and Glen Matten, who published a guide and a recipe book in 2016. The diet focuses on sirtuins, or proteins in your body that specialize in cellular health and metabolism, among other things. Sirtuins can be found in foods like kale, extra-virgin olive oil, buckwheat, matcha, blueberries and arugula. The menu’s sweet surprises include red wine, coffee and dark chocolate. Meat is not a sirtuin.