The Price Tag hitmaker announced last week (ends28Jun15) that she was in hospital recovering from an operation, but would not reveal the nature of her surgery or illness.

She cancelled upcoming gigs in England, Belgium and Denmark as she took longer than expected to get better, and she has now revealed she has undergone another procedure.

The singer, who suffered an irregular heartbeat and seizures in her youth, writes on, "Just had a second surgery... Im not any better but everyday working towards it ... I love and trust the people around me enough to face my fears of operations even if I need a little push sometimes.

"As I said before I don't want to and won't be talking about what's wrong and what's happened... I'm telling you how I am because some people ask... And with me having to cancel some shows it's fair to those asking where I am that you know I'm in hospital and I haven't just disappeared... God bless you all sending love support prayers and well wishes."