English singer-songwriter Ed Sheeran is currently undergoing a copyright trial in a Manhattan federal courtroom over his hit song "Thinking Out Loud".

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Their relationship goes beyond just being co-stars, The trial has pitted Sheeran against the heirs of Ed Townsend, who was a co-writer of Marvin Gaye's classic song "Let's Get It On". as Diane is Laura's real-life mother.

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The attorneys of the Townsend family have accused Sheeran of plagiarizing elements of the 1970s hit for his own song.

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During the trial, Sheeran testified and strongly rebutted the attorneys' arguments that he had copied the song.

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One of the pieces of evidence that was discussed was a fan-shot video of Sheeran mashing up the two songs in concert in 2014.

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Despite objections from Sheeran's attorneys, the judge allowed a 30-second clip of the mashup to be played in court.

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Sheeran argued that many songs have similar chords and that he often mashes up songs during his performances.

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 He also pointed out that if he had copied "Let's Get It On," he would not have done so in front of a large audience.

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Sheeran's attorney argued that "Thinking Out Loud" used "exceedingly common musical building blocks" that cannot be owned by anyone.

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The trial has gained a lot of attention due to the high-profile nature of the artists involved and the potential implications for copyright law.

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