Audrey Hepburn's original vocals in My Fair Lady

Some of you may not have seen these, but below is footage of Audrey as Eliza Doolittle from My Fair Lady singing to her original recorded vocals, not Marni Nixon's dubbing. While it's said that Audrey did record all of her songs to completion, the only vocals of hers available are "Wouldn't It Be Loverly?" and "Show Me," which she sings about 95% of in the final cut of the film. I really hope the rest of her songs weren't thrown away or lost forever.