A message her website read on Thursday: 'Bonnie's family and team are heartbroken to announce that Bonnie unexpectedly passed away last night in hospital in Portugal as a result of the illness that she was being treated for.'

The singer recently went into cardiac arrest following surgery which left her in an induced coma.

The Welsh star, who owns a property on the Algarve had been treated for emergency bowel surgery and a perforated intestine after a burst appendix.

A spokesperson for the singer confirmed at the time: 'Bonnie has been put into an induced coma by her doctors to aid her recovery. We know that you all wish her well and ask for privacy at this difficult time please. 

'We will issue a further statement when we are able to.'