Sinéad O'Connor has pulled out of her scheduled gig this week at the Galway International Arts Festival Big Top and cancelled a string of European dates, citing “exhaustion”.

The controversial singer was due to play the Fisheries Field tomorrow night. The gig will go ahead, with John Grant moving up to the headline slot, and Sharon Shannon being added to the bill.

“Sinéad O’Connor apologises profusely to her fans but she cannot travel this summer anymore,” a statement from her agent said. “She is suffering from exhaustion due to an existing not resolved medical situation and she has been advised by the doctor to stop any activity and rest. Because of this she is completely unable to travel and to perform.”

Other gigs scheduled for Norway, Canada and Belgium, between next week and the end of August, will also be cancelled.

The GIAF has offered full refunds for anyone opting not to go to the Big Top gig. However, if you do choose to hit the Fisheries Field, they’re offering a free drinks voucher to all ticket-holders and a €10 voucher for the 2016 Festival.