Much like a song title in Eminem's 2010 album Recovery, the prominent rapper and his representatives Won't Back Down on the National Party.
In 2017, the High Court deemed Eminem Esque, a song used in a National Party election ad in 2014, breached copyright of Eminem's song Lose Yourself.
Justice Helen Cull instructed the National Party to pay $600,000 to Eminem and his representatives for using the alternative version.
The party lodged an appeal against the fee and in December last year, the Court of Appeal ruled the National Party would pay only $225,000 in damages.
However, RNZ reports Eminem's representatives have lodged a separate appeal to the Supreme Court following the Court of Appeal decision.