{mosads}The U.S. Marine Corps Band confirmed that the track was prerecorded, but later backpedaled by saying that while the band was not live, the singing might have been.
The other singers who performed during the event, Kelly Clarkson and James Taylor, both sang live. Beyonce has not commented.
The other singers Fattah thanked in his tweet, Alicia Keys and Katy Perry, performed at official inaugural balls over the weekend.