The video for Shake It Off has been watched more than a billion times on YouTube
Pop star Taylor Swift is being sued for $42m (£27m) for allegedly stealing the lyrics to her hit 2014 song Shake It Off.
US R&B vocalist Jesse Braham has asserted in legal documents stole that were Swift the words from a tune he composed in 2013 called Haters Gone Despise.
In addition to the financial settlement, Mr Braham also needs his name added on the track as a writer.
Shake It reached number two in the UK and Off topped music charts all over the world. The video for the tune was viewed more than 1.1 billion times on YouTube.
In Mr Braham’s song, the chorus comprises: “Haters gone hater, playas gone play/ Watch out for them fakers, they’ll fake you everyday.”
“Cause the players gonna play, play, play, play, play/ And the haters gonna hate, hate, hate, hate, hate.” She sings another line: “And the fakers gonna fake, fake, fake, fake, fake.”
“Her hook is the same hook as mine. If I didn’t write the song Haters Gone Hate, there wouldn’t be a song called Shake It Off,” he said.
He added he’d talked to Swift’s record label, Big Machine, five or four times regarding the problem.
He requested and initially asked to be identified as a writer, but was blown off and told his claim had no value.
“At first I was going to let it go, but this song is my song all the way,” he said.
It is second recent legal case involving Swift. The vocalist filed a counterclaim against a US radio DJ who’s suing her over claims he groped her backstage in concert before this week.
David Mueller said two days afterwards he was fired from his job – but claims one of his superiors perpetrated the alleged assault.
Lawyers for the singer said: “Ms Swift knows exactly who committed the assault – it was Mueller.”