In sheer power, her high notes were sometimes compared to those of the Broadway belter Ethel Merman. However Nilsson claims her "explosive" high notes that were her biggest asset on-stage "have not been recorded like they should have been" in the studio. She later lamented: "It always made me a little bit sad when I heard my own recordings. And many people told me that I sang much better in person than I do on the recordings! That didn't flatter me at all, because I know what's going to be left when I am no longer singing".