James Arthur was rushed to hospital in 'agony' with kidney stones after performing at the Pride of Britain Awards last weekend.
The X Factor winner, 35, performed at the event after admitting the horrible pain started before he even walked the red carpet at the Grosvenor Hotel.
Speaking to Amanda Holden and Jamie Theakston on Heart Breakfast, James admitted that he loaded up on paracetamol to ensure he made it through the performance.
He said: "It started just before I hit the red carpet, I was all suited and booted, I started to feel this pain in my left…crown jewel shall I say.