Carrie Underwood's performance at Donald Trump's inauguration was interrupted by an audio error, prompting the Grammy winner to sing a cappella.

Carrie Underwood performed a stirring a cappella rendition of "America the Beautiful" after the official swearing-in of President Donald Trump at his inauguration on Jan. 20.

Carrie Underwood was among the performers during the presidential inauguration ceremony held for Donald Trump, which took place at the U.S. Capitol Rotunda on Monday (Jan. 20). The country superstar's performance took place after Trump took the oath of office as the 47th president of the United States and made his inauguration speech,