While Britney Spears’ record label Jive is officially saying the singer has flu and a throat infection forcing her to cancel her European promotional tour, an industry source tells The Sun the exhaustion has more likely been brought on by hard partying. “This is a disaster in commercial terms,” the source said. “Britney’s record sales have nose-dived recently. She really needed to work hard to plug this album. She is absolutely exhausted and felt in her condition there was no option but to fly home. But there’s a feeling that her wild partying hasn’t helped things.” Read more.