Britney Spears has "weak eyes, stress, asthma and headaches".
The 37-year-old singer opened up about her ailments and weight loss plan, and shared a chart on social media detailing the food she eats to help with her own regime.
She wrote on Instagram: "I have weak eyes and stress and asthma and headaches.
"So this chart has helped me so much with those problems .... and my weight !!! Whoop whoop.
"As a mother of pearl would say ... it works well for children too."