Alexandra Burke is a singer who won X factor in 2008 December. She is 21 and her birthday is on 24th August 1988. She has had 3 number 1 hits including Hallelujah, Bad boys and Broken heels. She has a Jamaican dad called David Burke and her mum is Melissa Bell, who used to be a very famous singer. Alexandra also has an album out called Overcome, which is really good.