Besides Carrie, opera singer Christopher Macchio performed “O America,” and the national anthem, during the inauguration. Country singer Lee Greenwood also performed “God Bless the U.S.A,” prior to Trump taking his oath of office.

Country star Carrie Underwood gave an impromptu a cappella performance of 'America the Beautiful' at Donald Trump's second inauguration on Monday after a glitch left her without backing music.

Fans react to Carrie Underwood’s a cappella performance of "America the Beautiful" at Donald Trump’s inauguration. See their responses here.

Carrie Underwood performed at Donald Trump 's presidential inauguration in Washington, D.C., on Monday, January 20 — but it didn't go down without a snag.

Carrie Underwood handled a musical mishap at the inauguration of President Trump like a pro, improvising and singing a cappella after the soundtrack didn't play.

For a brief moment that felt much longer, the inauguration audience suffered in awkward silence until Underwood mouthed to an audio technician that she was going to continue on wi

Country superstar Carrie Underwood performed “America the Beautiful” at the inauguration of President Donald Trump on Monday. But there was a problem.

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