Fans react to Carrie Underwood’s a cappella performance of "America the Beautiful" at Donald Trump’s inauguration. See their responses here.

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.

The decision by the Oklahoma native, Grand Ole Opry member, and American Idol judge to accept the invitation to perform at Trump's inauguration ceremony was met with criticism by

Country superstar Carrie Underwood performed “America the Beautiful” at the inauguration of President Donald Trump on Monday. But there was a problem.

Carrie Underwood is gearing up to perform at President-elect Donald Trump's swearing-in ceremony. Throughout her 20-year career, the "All-American Girl" crooner has mostly avoided voicing her political opinions. But the former "American Idol" winner expressed her love for the United States when she agreed to perform at the momentous occasion.

The Oklahoma native will perform at Donald Trump’s inauguration ceremony in Washington DC and will perform “America the Beautiful.”

In an exclusive interview with Fox News Digital, Lee Greenwood came to Carrie Underwood's defense after some criticized the country star for agreeing to perform at the presidential inauguration on Jan.

A string of celebrities lined up to watch Donald Trump getting sworn in to the office of President of the United States for a second time - with singers and billionaires in the crowds

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.

See images of the celebrities and prominent business leaders attending the inauguraton of President Donald Trump in Washington, D.C., on Monday.

Country superstar Carrie Underwood performed “America the Beautiful” at the inauguration of President Donald Trump on Monday. But there was a problem.