adoannie "Oklahoma!" flirt "I Cain't Say No" singer ''Oklahoma!'' role Character who sings "I Cain't Say No" "Oklahoma!" fiance "Oklahoma!" character who sings "I Cain't Say No" "Oklahoma!" girl who just cain't say no "Oklahoma!" gal 1955 Gloria Grahame musical role Musical "girl who cain't say no" ''Oklahoma!'' character