After winning The X Factor , Burke released the winner's single " Hallelujah ", which became the European record holder for the most singles sold over a period of 24 hours, selling , in one day,  and became the top-selling single of in the UK and the UK's Christmas number one. By January , the single had sold over one million copies in the UK alone, a first for a British female soloist. Her third album, The Truth Is , was released in March Burke shares the middle names Cecelia Ewen with her mother and her sister, Sheneice. Burke auditioned for the second series of The X Factor in which was eventually won by Shayne Ward. She made it through to the final seven in Louis Walsh 's 16—24 category, effectively the top 21 of the competition, but Walsh did not choose her for his final four as he felt that she was too young.
The X Factor winner Alexandra Burke's first single, a version of Leonard Cohen's Hallelujah, is the fastest-selling download ever across Europe despite only being available since yesterday. Burke's single has sold more than , copies since going on sale at midnight on Saturday, fewer than two hours after she won the fifth series of the ITV1 reality show. HMV is already predicting that she has the Christmas No 1 "all wrapped up".
Proving the old adage "If at first you don't succeed After leaving school, Burke concentrated on pursuing a career in the music industry, performing at various clubs and touring with Young Voices, a choir that raised money for children with leukemia. In , she auditioned for the second series of The X-Factor, where she made it to the final seven of her category, only narrowly missing out on a place in mentor Louis Walsh's top three. In , she entered the series again, but this time impressed new judge Cheryl Cole enough to be chosen for the live shows. A major contender from the outset, Burke never appeared in the bottom two and, after several shock eliminations, became the red-hot favorite to win the series.