Donald Trump has been getting a lot of backlash for using artists' material in his campaign.

The most recent being from George Harrison's estate.

As Trump's daughter, Ivanka Trump introduced her father, the Beatles tune "Here Comes the Sun" played in the background.

Harrison's estate took to Twitter to write, "The unauthorized use of Here Comes the Sun is offensive and against the wishes of the George Harrison estate."

In a bit of a jab, they later tweeted, "If it had been Beware of Darkness then we MAY have approved it! #TrumpYourself."

Other artists who have recently opposed the use of their material by the Trump campaign include Earth Wind and Fire, Aerosmith, Queen, Paul Rogers and the Rolling Stones.