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.

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.