In a video post on Instagram, the 37-year-old “Price Tag” hit-maker told fans she’s been ‘in and out of tests’ – and plans on undergoing surgery.

When she was younger, the star suffered a heart condition aged eight and a minor stroke at 18.

In 2003, at age 15, Jessie won Best Pop Singer in the TV show Britain’s Brilliant Prodigies, performing as Jessica Cornish.

At the age of 16 she began studying at the BRIT School in Croydon and at 17 she joined a girl group named Soul Deep.

She graduated in the class of 2006 along with singers Adele and Leona Lewis.