Singer Adele is turning vegetarian to lose weight after fashion designer Karl Lagerfeld called her too fat.

The 23-year-old Grammy winner and her 36-year-old charity campaigner boyfriend Simon Konecki have followed a strict vegetarian diet for the past one month and have lost almost a stone. The couple goes for jogging every morning.

The weight is dropping off them and they plan to keep dieting until the end of April, the Daily Mail reported quoting a friend of the 23-year-old Grammy winner, who lives with Konecki in a rented £6million pile in West Sussex.

They are inseparable - they are losing weight together, getting fit together and planning a future together. Adele says she's doing her best work and feels healthier than she has for months, he added.

Adele has been working out with a personal trainer twice a week at her home and has reportedly quit smoking.

Adele has found so much more energy now she's quit smoking. She really wants to get healthier, now that she's half-way there, the Sun reported, quoting a source.

She had always been curious about taking up Pilates but until recently there just hadn't been any time.

British singer Adele performs at the 42nd Montreux Jazz Festival
British singer Adele performs at the 42nd Montreux Jazz Festival in Montreux July 12, 2008 REUTERS/Valentin Flauraud
Singer Adele
British singer Adele is in the shape of aubergines REUTERS