What’s more surprising is that she had been up all night the night before and actually almost didn’t make the recording — she had been on a flight to get to the recording in New York, when a bomb threat was called on the plane she was on. They were forced to make an emergency landing and had to wait around for hours before they could take off again. But she came in to the studio at the very last moment and performed the song with a full orchestra and knocked it out of the park.

Source: https://www.buzzfeed.com/briangalindo/disney-facts-that-are-really-intriguing-and-obscure