Alexandra Imelda Cecelia Ewan Burke ( born August 25 , 1988 ) is an English soul singer , who was born in Islington , London . She is known for winning the fifth series of the X Factor UK in 2008 . Alexandra Imelda Cecelia Ewan Burke ( born 25 August 1988 ) is a British singer who rose to fame after winning the fifth series of British television series The X Factor in 2008 .