Alexandra Burke gave a special performance of You Are So Beautiful at a secret X Factor gig on Monday night.
The singer, 19, who is tipped to win the ITV show, sang once because she was nursing a sore throat.
Alexandra has reached the semi-final along with Eoghan Quigg, Diana Vickers and boyband JLS.
She is mentored by Girls Aloud star Cheryl Cole, 25.
SEE PICS All the action from the X Factor secret gig>>>
SEE VIDEO All the performances and interviews from The X Factor secret gig>>>
SEE PICS All the action from last week's X Factor live show>>>
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