Sources close to the singer have now revealed she was unhappy with the event and felt she wasn't "given the same level of respect" as previous inauguration headliners like Beyonce.

Carrie Underwood has been criticized for accepting an invitation to perform at Trump's inauguration, but a source revealed she "doesn't care" what critics say and is "very proud" of herself.

Underwood's performance of "America the Beautiful" was marred by technical difficulties, forcing her to improvise to keep the show going.

After the performance, the source said Daily Mail that the singer was unhappy because she felt she wasn't given a "stage or platform" like previous performers.

The event was originally scheduled to be held outside, but was moved at the last minute on Friday as the weather forecast predicted cold conditions for Washington, DC, on Monday.

This change of plans apparently affected Underwood, with a source explaining that she was "unhappy with her performance at the event, primarily due to the limited space she was given, which made her feel cramped and uncomfortable."

"Her anxiety was high during the performance and she felt she was not afforded the same level of respect or admiration that previous performers such as Beyoncé and Lady Gaga have had," the insider continued. "She felt like she was in and out, and then she had a little gushing fit."

"She's used to playing in big venues with a stage to herself. She's not given a stage or a platform," the source added. "She felt like she was literally just in a room with people all around her and a microphone. It canceled out the acoustics."

According to Daily Mailanother source revealed that the "American Idol" star continued her performance on Monday because she "wanted to go smoothly."

Underwood and President Trump were left confused when the theme song stopped playing just as it was about to start. An awkward silence fell on the crowd as the singer visibly held the microphone, feeling uncomfortable.

However, she decided to carry on regardless, making an angry face as she told the crowd to sing along with her "if you know the words".

"While her performance wasn't ideal, nor was it what she wanted it to be because she wanted it to go smoothly, the fact that there was some awkwardness in getting things going just added to the unique nature of it all," a source told the paper.

The source went on to say that while Underwood would eventually get over the problem, she hoped it would be a memorable moment.

"In the end, she'll laugh it off and take it for what it is, but she's disappointed that it wasn't the moment because the moment she was looking for was altered by technical difficulties," the source said.

They explained that Underwood is still "proud of herself" for "being able to save her from a total disaster."

"Even though it's not her day, and she just wanted to complete the day without replacing anything, she was annoyed with how it turned out," the source added.

Days before the event, the "Somethin' Bad" singer was criticized by fans for accepting an invitation to perform at Trump's inauguration.

However, a source revealed that she "understands the backlash" but "doesn't care" what the reviewers think because "it seems wider than any controversy" and decided to perform "for America, not specifically for Trump".

"This is going to be a big year for Carrie who is starting out as a judge on American Idol and is now performing at the inauguration," the source explained. Daily Mail.

"This is something she is very proud of, and what she is turning to is doing it for America, not specifically for Trump," they pointed out.

According to the news, the insider further noted that Underwood aimed to unite the country through her sound.

"She wants to unite the country and music is her way of doing that, she looks beyond all the controversies that have arisen and will arise," they said.

As for whether or not Underwood's inauguration performance will affect her stint as a judge on "American Idol," the source explained, "Those on Idol aren't going to make a big deal out of it and support her decision."

"They are excited to have her as their new judge and look forward to America falling in love with her all over again," they said.

The singer herself released an official statement in which she said she was "honored to be asked to sing at the inauguration and to be a small part of this historic event."

"I humbly respond to the call at a time when we must all come together in a spirit of unity and looking to the future," she added.