No, she sang a very respectful national anthem.
Yes, although with many vacal embelishments some purists would probably complain about.
Plus, instead of a recorded music track, a live orchestra accompanied her, and the arrangement was one of my top 3 faves. Did they announce who did the arrangement? David Foster, my all-time favorite arranger, did Faith Hill's and Whitney Houston's arrangements of the anthem. This sounds a lot like his work.
Michael