"The day of the mass murder of 11 human beings at the hands of a 'crazy nationalist', you played his song" Happy "to a crowd at a political event in Indiana," King wrote in the letter. "There was nothing & # 39; happy about the tragedy inflicted on our country on Saturday and no permission was granted for the use of this song for this purpose."
King affirms that the use of "Happy" without consent constitutes a violation of copyright and trademark.
"Pharrell has not granted, and will not grant, permission to play or publicly broadcast his music in any way," King wrote.
This is not the first time that Trump receives criticism from angry musicians after using his music without permission. The Rolling Stones, The O & # 39; Jays, Adele, Queen and several others have asked Trump to also stop using his music.