Have sunnier songs than "Supercalifragilisticexpialidocious" and "A Spoonful of Sugar" ever been sung? While Julie Andrews could also be sexy, funny and matriarchal, her best music slices through the dreariness of everyday life like a happy diamond. Andrews' crystalline four-octave voice is forever the sound of raindrops on roses and whiskers on kittens. As the title character in 1964's Mary Poppins, and as Maria in The Sound of Music the following year, the British stage and screen star represents a kind of vocal purity that has never quite been equaled.