Hall and Butler have previously worked with some of the biggest names in music, with Hall writing for Backstreet Boys, Aaron Carter and Victoria Beckham and Hall working for Justin Bieber, Pink and Maroon 5.
Back in 2015, a judge dismissed a similar lawsuit against Taylor for the same song, Shake It Off.
However, her representative has strenuously denied their claims, stating: "This is a ridiculous claim and nothing more than a money grab".
'The law is simple and clear.
Under fire: Taylor Swift, 27, is being sued by a pair of songwriters over claims the Grammy-winning beauty lifted as much as 20 percent of their song Playas Gon' Play for her 2014 hit Shake it Off.
In a new lawsuit, the accomplished songwriters allege that 20 per cent of Shake It Off is their 2001 song Playas Gon' Play, due to the lyrics "Playas, they gonna play and haters, they gonna hate". They are now suing her for allegedly ripping them off.
Sean Hall and Nathan Butler say they wrote a song entitled "Playas Gon' Play" back in 2001, and it Hit #81 on Billboard Hot 100. "They do not have a case", they wrote.
It's arguably one of her most successful songs EVER.
"Shake It Off", written by Swift, Max Martin and Shellback, nclude lyrics such as: "Cause the players gonna play, play, play, play, play/ And the haters gonna hate, hate, hate, hate, hate".
'If they want to forget about the lyrics, they can, ' she said, 'but if they want to hang on every word, they can do that, too'.