President Trump has been served a "cease and desist" letter by American musician Pharrell after his song "Happy" was played at an appearance by Trump that was hosted by the Future Farmers of America in Indianapolis.

"Pharrell has not, and will not, grant you permission to publicly perform or otherwise broadcast or disseminate any of his music," the letter read. The letter cites the Pittsburgh shooting and Trump's use of the song on the same day as a catalyst for the grievance over the song's use.

Pharrell isn't the first musician to tell Trump to stop using his music. In fact, just this year, both the estate of Prince and Aerosmith have requested that Trump quit using their songs at his rallies. It's the second demand by Aerosmith after Trump has used both "Dream On" and "Livin' on the Edge" by the rock band.

Mick Jagger and his band, The Rolling Stones, have been vocal since 2015 against Trump using their music. Trump ends almost every rally with "You Can't Always Get What You Want." But, Jagger conceded in a video posted to Twitter, the band has little recourse over music played in public spaces because of unmentioned legalities in the U.S.

After all this, however, it's possible that Trump and his team weren't even involved in the use of "Happy" at the FFA event. According to the Indianapolis Star, an FFA spokesperson said that the group had created the playlist for Trump's appearance and his only request was to play "God Bless America" by Lee Greenwood.