The lawsuit, which asks for damages to be assessed at a jury trial, argues that the harmonic progressions, melodic and rhythmic elements central to “Let’s Get It On” formed the structure of Sheeran’s Thinking Out Loud.

“The Defendants copied the ‘heart’ of ‘Let’s’ and repeated it continuously throughout ‘Thinking,'” the lawsuit said. “The melodic, harmonic, and rhythmic compositions of ‘Thinking’ are substantially and/or strikingly similar to the drum composition of ‘Let’s.'”

Grammy Award-winning Sheeran has become one of Britain’s top-selling artists in the past two years, and has written and co-written tracks for artists such as One Direction, Taylor Swift and Justin Bieber.

Amazing has generated more than one million video plays on YouTube, while Photograph has more than 208 million.

Gaye’s family last year successfully sued R&B recording artists Robin Thicke and Pharrell Williams for copyright infringement in another unrelated case over their hit single “Blurred Lines,” winning a $7.4 million judgment.