Ed Sheeran's Grammy-winning hit love song "Thinking Out Loud" qualified for Diamond status last year when it achieved sales and streams exceeding 10 million, becoming just the 15th song ever to surpass that mark since the certification was created 20 years ago.
Thinking Out Loud is one of Sheeran's most popular songs, and it won him a pair of Grammys - song of the year and best pop solo performance - in 2016.
In addition to the aforementioned 2016 lawsuit, the singer-songwriter was also forced to add two credited songwriters to his 2015 single "Photograph" after they claimed it was a note-for-note copy of a song they wrote for former "X-Factor" victor Matt Cardle. He reportedly claimed that the chord progressions and drum patterns of the two songs were "extremely commonplace" and that similar elements in "Let's Get It On" were in the public domain and unprotectable.
Listen to "Let's Get It On" and "Thinking Out Loud" below.
Sheeran has not commented on the allegations.
Songwriters Martin Harrington and Thomas Leonard alleged Sheeran used identical notes from a song they wrote in 2009 entitled "Amazing" in his in his 2014 single "Photograph".
Ed Sheeran performs at the Brit Awards at the O2 Arena in London, Britain, February 21, 2018. TMZ reports that the lawsuit was filed Structured Asset Sales in 2nd U.S. Circuit Court of Appeals in NY.
Past year he settled a copyright infringement claim against single Photograph, for $20million (£13.8m), after songwriters Thomas Leonard and Martin Harrington claimed it sounded very similar to their own song, Amazing.