So, this is an enjoyable featurette on her, and how the musical came to be, and her hesitancies about it, and more. All fine. But what's so fun here is that for the fifth anniversary, the producer had her appear on stage as herself near the very end -- and didn't tell the audience of the surprise beforehand -- and they have footage of that moment, and the audience going crazy when they realize what's happening.
It's a good piece without that. With it, it's a treat.