Whitney Houston sets the gold standard for US National Anthem

The only word that can be used to describe this performance is: flawless. Whitney sang the anthem in 1991, when America was still at war in the Persian Gulf. This was the singer at her prime, and the rendition was later released as a charity single, with Houston donating her profits to help soldiers returning home. The single was re-released after September 11, 2001 and reached #6 on the Billboard Hot 100, with Houston once again donating the proceeds from sales to help firefighters and other victims of the attacks.

Source: Idolator