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’s performance of “America the Beautiful” at Donald Trump’s Monday inauguration was awkwardly interrupted by an audio error, prompting the Grammy winner and accompanying chorus to sing the patriotic tune a cappella.

An awkward few moments at Donald Trump’s inauguration turned into a powerful performance as the attendees joined Carrie Underwood to sing ‘America the Beautiful.’