Well.. I guess I can be the lone voice of dissent here. I am regularly asked to sing the
national anthem at various events and there are almost always strings attached. Loads of history about this song - based on an old pub tune.
Often I am contractually required to follow the provisions laid out in the
National Anthem Committee (NAC) code (1942).
It lays out the proper key for performances (A-flat or B-flat), requiring no liberty be taken in either style or substance with the approved version of the National Anthem, the requirement of an announcement before the anthem for the assembled to join in singing, mandating the tempo of the anthem, and specified that on the metronome—settings 104bpm for the verses and 96bpm for the chorus.
There is a lot of controversy about this as the Congressional adoption of this code (June 1942) left out many of the details recommended by the committee and included the phrase—
with the right hand over the heart—which was not contained in the NAC document. This decision was almost immediatly denounced by various stake holders.
Personally I like the song plain and undecorated. The words are good and should be able to stand on their own. The intent of the old code was that the song shine - not the performer. When the song is sung in a nonstandard way, you can't sing along and this is our song, a participatory anthem and a straight forward version gives you a fighting chance of singing along.
Still - I hope that she was well paid for this harrowing 90 seconds or so. The stakes are very high for the performer...