Rapper Eminem's legal team are taking a copyright complaint against a New Zealand political party to the country's top court.
The conservative National Party was in 2017 ordered to pay the Detroit musician's label, Eight Mile Style, $NZ600,000 ($A570,530) after using a track that bore striking similarities to the song Lose Yourself in a 2014 election campaign ad.
An appeals court in December slashed the amount to $NZ225,000.
It's now been confirmed Eight Mile Style filed documents with the Supreme Court last month to challenge that ruling.
The court will first have to decide whether it will consider the case and is awaiting further submissions.
Lose Yourself was composed by Marshall Mathers III (Eminem), Jeff Bass and Luis Resto - who formed the Eight Mile Style company - in 2002.
Bass described the song as the most valuable in the catalogue and said it had never been cleared for use in any political campaign.
National paid $NZ4800 for a song called "Eminem-esque" to a production company in 2014, with the tune appearing 186 times on television, as well as on the internet and at a party conference.
Australian Associated Press