Alexandra Burke is a British singer and songwriter who gained fame after winning the fifth series of the reality TV show The X Factor in 2008. Her debut single, "Hallelujah," became a massive hit, topping the charts in the UK and earning her critical acclaim. In addition to her music career, Burke has also appeared in various stage productions, showcasing her talent in theater. She has released several albums and singles, contributing to her reputation as a versatile artist in the pop and R&B genres.