'X Factor' hopeful Hannah Barrett has revealed she's been bombarded with racist abuse on Twitter. The 17-year-old, who is being mentored by Nicole Scherzinger on the ITV singing contest, has claimed: "People say I'm too dark to be a singer and there have been lots of references to how dark my skin is". Opening up to Reveal magazine, former Greggs Bakery worker Hannah added: " The sad thing is ...