John Oliver mocks New Zealand - again

John Oliver says watching footage of Eminem's court battle against New Zealand's National Party is "everything I need right now".

The news comedian opened the latest episode of his hit HBO show Last Week Tonight by addressing the court battle playing out in the High Court in Wellington.

Lawyers are arguing whether a rip-off of Eminem's Lose Yourself was used for a National Party campaign ad in the 2014 general election.

Oliver quickly found the funny side.