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.

Country superstar Carrie Underwood performed “America the Beautiful” at the inauguration of President Donald Trump on Monday, but not the way she expected she’d sing it. Underwood had to improvise and sing acapella at the last moment when there was a technical problem with the band or music that was supposed to accompany her performance.

Trump has long struggled to get high-wattage celebrities to perform at his events. In 2017, the list of musicians who reportedly turned down performing at Trump’s first inauguration included Elton John, Garth Brooks, Celine Dion, Idina Menzel and KISS.

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.

Carrie Underwood was forced to sing a capella at Trump's inauguration on Monday, after the music track for her wouldn't play.

Country music star Carrie Underwood performs “America the Beautiful” following President Donald Trump’s inaugural address.

The “God Bless the USA” singer will perform at President-elect Donald Trump's inauguration on January 20.

Kid Rock, a longtime Trump supporter, and Billy Ray Cyrus will join Lee Greenwood and the Village People at the Make America Great Again Rally at Capital One Arena in downtown Washington on Sunday, along with a choir from Liberty University.