Childish Gambino is being sued for copyright infringement over his Grammy Award-winning rap song This Is America.
Emelike Nwosuocha, a rapper who performs as Kidd Wes, claims the song copied his track Made In America, which was released two years earlier.
The "lyrical theme, content and structure" of the two songs' choruses are "glaringly similar", he said in court documents filed in New York.
In 2019, This Is America made history by becoming the first rap track to win song of the year at the Grammy Awards.
However, in court documents, Nwosuocha said there was a "substantial similarity" between Glover's track and his own.
The rapper also employed a musicologist to compare the two tracks, who concluded that "these similarities are likely not coincidences", the court documents said.
His legal case also named Childish Gambino's record label, RCA, Roc Nation and Young Thug, who performed backing vocals on the track.
Childish Gambino's manager Fam Udeorji rejected the claims of plagiarism, saying his client's song actually dated back to 2015, "and we have the Pro Tolls [computer] files to prove it".
If so, the song would also pre-date Nwosuocha's Made In America, which he first posted on SoundCloud in September 2016.
Childish Gambino makes Grammys history.
Review: Childish Gambino's This is America ★★★★☆.