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.

Trump has long struggled to get high-wattage celebrities to perform at his events. In 2017, the list of musicians who reportedly turned down performing at Trump’s first inauguration included Elton John, Garth Brooks, Celine Dion, Idina Menzel and KISS.

Hollywood singer Carrie Underwood faced a technical glitch with the background music during her performance at Donald Trump's inauguration. However, despite the glitch, the songstress appeared to be in good spirits as she continued to sing.

Country superstar Carrie Underwood performed “America the Beautiful” at the inauguration of President Donald Trump on Monday, but not the way she expected she’d sing it. Underwood had to improvise and sing acapella at the last moment when there was a technical problem with the band or music that was supposed to accompany her performance.

Watch: Awkward moment that music fails as Carrie Underwood sings at Donald Trump inauguration - The country music superstar was forced to perform acapella

Greenwood is slated to sing his hit “God Bless the U.S.A” at Trump’s inauguration on Monday, Jan. 20. He is also slated to play at the “Victory Rally” on Sunday, Jan. 19 at Capital One Arena. McCollum is slated to play at the Commander in Chief Ball.

Hollywood and celebrity A-listers did everything in their power to stop Donald Trump from returning to the White House last year, bringing to the campaign trail megastars including Taylor Swift, George Clooney,

Country music superstar Carrie Underwood will perform “America the Beautiful” at U.S. President-elect Donald Trump’s inauguration on Jan. 20, according to a copy of the program shared by a spokesperson of the presidential inaugural committee.