[embed]https://www.youtube.com/watch?v=YV0dZnBHWn8[/embed] YES I KNOW SHE'S NOT AN OPERA SINGER
I still have no personal preference for child singers, but I have come to the conclusion that Pamela might have to be the exception to the operatic voice rule, even in the stage version. After some testing, there is no way to make her a convincing child character otherwise. The singer here is not a child, but played the part perfectly for the demo.
Assuming a staging, in the event that no children fit the part, Pamela might end up becoming a strange childish young woman (probably played by a soubrette), which is actually not that out of place in the strange land of Ikana.
Rest assured, despite my personal taste, I feel it is important that Pamela remains a child, so a good child singer is definitely going to remain plan A.