Pharrell Williams has sent President Donald Trump a cease and desist letter for using his song “Happy” at a campaign rally just hours after the Tree of Life Congregation shooting in Pittsburgh, which left 11 people dead.

“On the day of the mass murder of 11 human beings at the hands of a deranged ‘nationalist,’ you played his song ‘Happy’ to a crowd at a political event in Indiana,” writes Pharrell’s attorney Howard King in the letter. “There was nothing ‘happy’ about the tragedy inflicted upon our country on Saturday and no permission was granted for your use of this song for this purpose.”

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The letter goes on to state that the use of “Happy” without the artist’s consent constitutes both copyright and trademark infringement.

Although the circumstances are gravely different here, this isn’t the first time Trump has received a cease and desist from a musician. Steven Tyler has repeatedly protested Trump’s use of Aerosmith’s music at his events, and others who have made similar complaints include Prince‘s estate, REM, Queen and the filmmakers of Air Force One.

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