Will Best jokingly let slip one of the potential reasons that Sharon Osbourne's stay in the Celebrity Big Brother house was so short.The former X Factor judge, 71, who left the show on Tuesday, had been a "celebrity lodger" rather than a full housemate and was even given a private bedroom. Sharon is believed to have been paid a huge £500,000 for just one week in the house. She had previously shared that she didn't want to stay for the entire series as she didn't want to be away from her husband Ozzy for that long.