Rachel Platten Displeased About Unauthorized Use of Her Song at Inaugural Ball

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Disgruntled songwriters are speaking out about the seemingly unauthorized use of their songs during President Donald Trump’s inaugural ball on Friday.

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Platten's hit song, "Fight Song" -- which coincidentally was the
anthem at several Hillary Clinton campaign rallies last year -- was covered
by YouTube sensations The Piano Guys in
a mash-up with “Amazing Grace."

In a pair of tweets posted hours later, Platten stated that the use of her song during the Trump-sponsored concert was completely unauthorized.

“While I respect the office of the President and the peaceful transfer of power, I want to make clear that at no point did the Piano Guys ask for permission, nor did I or anyone on my team know of, approve or endorse their decision to play Fight Song tonight,” the 35-year-old singer wrote.

WATCH: Rachel Platten Sings ‘Fight Song’ With Inspiring 7-Year-Old Cancer Patient

The Utah-based quartet quickly responded, stating that their performance “had nothing to do with Hillary Clinton or politics.”

Platten isn’t the only songwriter speaking out. The Piano Guys also covered One Direction’s “What Makes You Beautiful,” to which Savan Kotecha -- one of the writers behind “Beautiful” and a slew of other Top 40 hits -- expressed his extreme “disappointment.”

“The song is about love, joy, and acceptance,” Kotecha told Billboard via email. “The fact that it was used to celebrate a man who stands for divisiveness and bigotry breaks my heart.”

“I wrote ‘What Makes You Beautiful’ for my wife,” the songwriter added, just after posting a tweet stating that The Piano Guys were “absolutely NOT given permission” to cover the track. “I am a son of immigrants. My children are biracial. A ‘Trump America’ makes me worried for their future.”

The YouTube foursome has yet to respond to Kotecha’s statements regarding the use of the One Direction track.

For more celebrity takes on Trump’s recent inauguration, watch the clip below.