Soul star Sharon Jones is preparing to undergo a major operation after doctors found a tumour on a bile duct.

The singer's band, Sharon Jones & The Dap-Kings, cancelled a number of performances recently, citing an "urgent family matter", and now it has emerged that Jones is in the midst of a frightening health crisis.

The 57-year-old star admits she has been feeling unwell for a while now, and is set to have surgery to remove a growth.

However, Jones is adamant doctors have given her a positive prognosis.

In a post on her page, she writes, "Over the last few weeks I haven't felt good and I didn't know what was going on. We sadly had to cancel shows while I went through a series of tests and short hospital stays. We just found out that I have a stage-one tumour on my bile duct. Luckily we caught it really early and fast and the doctors say it's operable and curable!

"I will be having surgery very soon and will have to rest and recover... I'm looking forward to getting back on the road to give the people what they want!"