name Mary Isobel Catherine Bernadette O'Brien Also known as Shan, Gladys Thong Born ( 1939-04-16 ) 16 April 1939 West Hampstead , London, England Origin Ealing , London, England Died 2 March 1999 ( 1999-03-02 ) (aged 59) Henley-on-Thames , Oxfordshire , England Genres Pop , soul Occupations Singer, arranger, musician, TV