Alexandra Burke won The X Factor in 2008.
Alexandra Burke . Burke rose to fame after winning the fifth series of British television series The X Factor in 2008 , becoming one of the most successful winners of the series . After winning The X Factor , Burke released the winner 's single `` Hallelujah '' , which became the European record holder for single sales over a period of 24 hours , selling 105,000 in one day , and became the top-selling single of 2008 in the UK and the UK 's Christmas 2008 number one .