Taylor Swift hits back in copyright lawsuit of her "Shake It Off" song

Swift was sued for copyright infringement in 2017 over hit song "Shake It Off"

Sean Hall and Nathan Butler, who wrote 3LW's 2000 song

"Playas Gon' Play," are accusing Taylor of using their words.

A Monday court filing declared that Swift wrote 2014's "Shake It Off" by herself.

Her attorney accused Hall and Butler of trying to cash in on the song's astronomical success.

Swift said that she wrote the song using experiences from her life and

in particular, unrelenting public scrutiny of her personal life.

She said she has never heard the song "Playas Gon' Play" neither heard the name of the band 3LW.

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