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.

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.