Cheryl Cole showed no sign of slowing down after her mammoth birthday party on Wednesday, spending yesterday evening at Nobu Berkley with hubby Ashley. She's back on the road today for more X Factor auditions. In addition to rumours that Cheryl is in the running to replace Simon Cowell as main judge on the show, reports today suggest Cheryl's also being lined up to front a US version of The X Factor. Simon apparently told Cheryl the news at her party, and senior executives from NBC are reportedly flying in to Manchester this weekend to observe Cheryl at the live auditions. With Simon on her side, I'm sure any visa problems will be sorted.