Diane Warren reveals Cher HATED If I Could Turn Back Time and Simon Cowell rejected I Was Here track

Simon Cowell gives a thumbs up on bike ride with Lauren Silverman - a year after back surgery

Sinitta 'promised she could be judge' on X Factor by Simon Cowell

‘I’m a one in a billion’ – how Diane Warren penned windswept power ballads for Cher, Gaga and Dion