If you saw the opening of the professional football championship game that I am supposedly prohibited from saying, you probably saw the singing of the National Anthem. I am not one to cast stones, and in the same situation I probably couldn’t have even remembered my name, let alone the words of a song.
That being said, here are some examples of how it should be sung:
or like this:
or especially like this, sung during Desert Storm in 1991 (click on the image, then click on “Watch on YouTube”):