Alexandra Burke won the 2008 series of The X Factor and went onto have the best-selling X Factor winner's single ever with her cover of Leonard Cohen's Hallelujah, the UK Christmas Number 1 2008.

Prepare to be dazzled by Alexandra Burke, or should we say, Deloris Van Cartier as she performs ‘Fabulous, Baby!’ – a show-stopping number from Sister Act the Musical. Hallelujah!