full show Singer Shirley Bassey performs onstage Oscars 2013 Singer Shirley Bassey performs onstage Oscars 2013 Singer Shirley Bassey performs onstage Oscars 2013 Singer Shirley Bassey performs onstage Oscars 2013 Singer Shirley Bassey performs onstage Oscars 2013 Singer Shirley Bassey performs onstage Oscars 2013