Still plugging away on judging duties, Cheryl Cole made her grand arrival at the "X-Factor" studios in London, England on Saturday (November 20). The British beauty was all smiles as she toted a cup of coffee while heading inside Fountain Studios ahead of tonight's live show. And while she's taking it all in stride, sources tell that Cheryl can't wait until the hit UK talent show comes to an end. A source told Star magazine: "This year's X Factor has been tough on Cheryl. On top of all her personal problems, the show has pushed her to breaking point." The Star insider added, "First she has to...