"The entire performance was live except for the national anthem," Master Sgt. Kristin duBois told The New York Times and other outlets. "We don't know why. But that is what we were instructed to do so that is what we did. It's not because Beyonce can't sing. We all know Beyonce can sing. We all know the Marine Band can play."
Earlier in the day, she told The New York Times that the rest of the inaugural performance was live and they did not know why a recorded track was used for the national anthem.