The "American Idol" alum performed a cappella when her backing music refused to take the wheel. Country singer Carrie Underwood gave an impromptu a cappella performance of “America the Beautiful” at Donald Trump's second inauguration ceremony on Monday when technical difficulties prevented her pre-recorded backing music from playing.

The show must go on! Carrie Underwood proved why she's a country superstar during Donald Trump's presidential inauguration on Monday (Jan. 20). After an awkward two-minute technical glitch, the 41-year-old American Idol alum took control of the situation,

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