The song became a popular anthem at Hillary Clinton campaign rallies last year, and her fans are tweeting their dislike of the Piano Guys performance at the Freedom Ball.

UPDATE: In a series of tweets, the Piano Guys — a Utah-based music group which became popular on YouTube and is comprised of Paul Anderson, Al van der Beek, Steven Sharp Nelson, and Jon Schmidt — responded to the backlash to their performance Friday night at one of President Donald Trump’s inaugural balls of Rachel Platten’s “Fight Song,” one that became an anthem of Hillary Clinton campaign rallies last year.

“Our performance tonight, which combined ‘Fight Song’ and ‘Amazing Grace’ had nothing to do with Hillary Clinton or politics,” the tweeted statement reads. “We chose to perform our version of ‘Fight Song/Amazing Grace’ — it was not endorsed by Rachel Platten. We love Rachel and we love her song.”

EARLIER: Rachel Platten is making it clear on social media, she did not know her hit “Fight Song,” which became a popular anthem at Hillary Clinton campaign rallies last year, would be performed Friday night at the Freedom Ball, one of three inaugural galas for President Donald Trump.

“While I respect the office of the President and the peaceful transfer of power,” Platten said in a series of two tweets, “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 Piano Guys played a mash-up of Platten’s song and “Amazing Grace” during their set, to honor personal heroes of theirs. The 2015 hit was closely associated with the former Secretary of State, so much so that celebrities made an a cappella version that aired at the Democratic National Convention.

Some social media users also weren’t pleased with the Trump association. “Just feels wrong to play Clinton theme song at trump inauguration #fightsong #inauguration,” one wrote.

“NEVER DISRESPECT FIGHT SONG,” another strongly asserted, while a parody account for former Vice President Joe Biden’s wife Jill said, “Someone hold my earrings.”