OK, I watched the live broadcast of The Sound of Music. Opinions have been mixed - I think it was a stretch to expect that Carrie Underwood would be a great actress when she hasn't done any appreciable amount of acting. In fact, it was brave of her to try something so iconic. She sang great, which is what she does, and the best acting was done by others in the cast - notably the Baroness (Laura Benanti).
I knew I recognized her from somewhere, but was surprised to learn what somewhere I knew her from, which was the USA series Royal Pains. When you read what she's done, including a Tony award, then I should know her from her other accomplishments. But as the first linked article states, just because she should be well-known doesn't mean she is well-known. As it says, "Though it’s criminal that none of Benanti’s film and TV star-is-born
moments have yet to birth more mainstream recognition, it’s fitting that
the latest opportunity comes in the form of a musical that quite
literally changed her life."