Cheryl Tweedy and Simon Cowell’s feud explained: Inside The X Factor judges’s famous fall out as they team up once again

Why did Cheryl and Simon Cowell fall out? [Getty] Simon Cowell and Cheryl are joining forces once again. Cheryl , 34, is teaming up with the composition mogul to help he choose which The X Factor contestants to put through to live shows, giving them a chance to win the ITV talent show. As Liam Payne’s girlfriend flies out to judges’ houses to offer her wisdom, it’s easy to forgot that at one point, now buddies Cheryl and Simon weren’t on talking terms at all.  But why …