Adele and her partner, charity campaigner Simon Konecki, have recently gone on a double diet, and shed almost a stone (approx 6.4 kilos) each within a month.
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By following a strict vegetarian diet and going jogging with Adele's dog, Louie, every morning, the couple have also reportedly become closer.
"They are inseparable - they are losing weight together, getting fit together and planning a future together," said a friend of the 23-year-old Grammy award-winning singer, who also incidentally lives in a rented house with Simon, 36.
"The weight is dropping off them and they plan to keep dieting until the end of April," said the mutual friend. "Adele says she's doing her best work and feels healthier than she has for months."
Remarks about her weight have plagued the Someone Like You singer throughout her career, with fashion designer Karl Lagerfeld being the most recent to comment.
Adele isn't the first celebrity to go on a radical diet and exercise regime to lose weight. Have a browse through our Top 10 favourite celebrity diets slideshow here.
Watch: Adele asked to be a judge on The Voice