New Zealand's National Party has released its first political ad on television with a sporting analogy to show how the economy is doing.

While many critics noticed the similarity of the political ad's music to Eminem's 2002 movie "8 Mile" soundtrack "Lose Yourself," campaign manager Steven Joyce claimed it was just a coincidence and denied any association with Eminem, 3 Newsreported.

According to Joyce, National Party had already checked for copyright issues with the music, which was bought and licensed through an Australian-based company that owned full rights to it.

"Some people are saying it's similar and that and that's fine for them but it's just a commercial track which we've used in the campaign," Joyce said adding he was "very relaxed" about the choice of music.

"Nobody has raised concerns with us about it," Joyce added.

This is not the first time the party is accused of borrowing popular music for their promotional material.

In 2007, British band Coldplay's record company EMI warned the party that their video entitled "Ambitious for New Zealand" featuring Prime Minister John Key could breach copyright, Stuff reported.

"I wouldn't even say it's been that 'professionally done' to quote Key with regard to DW's (Wellington guitarist Darren Watson) Planet Key song," music critic Simon Sweetman commented.

"It's a cheap copy, slowed down just a touch too, gets done a bit in advertising, poor man's versions to avoid paying rights," Sweetman added.

Eminem has yet to comment on the issue.

Meanwhile, the Detroit rapper, who is currently on tour with Rihanna, was nominated by Dr. Dre to do the Ice Bucket Challenge.

Nominated by Tim Cook on Aug. 15, hip hop mogul Dr. Dre accepted the challenge by pouring ice-cold water on his head and challenged rappers Eminem, Snoop Dogg, and Kendrick Lamar to follow suit, Mashable has learned.

While the Ice Bucket Challenge requires nominees to do the challenge within 24 hours, Dr. Dre did the challenge four days after Cook's nomination.

After Beats acquisition, Dr. Dre is the latest business and technology entrepreneur who took part in the Ice Bucket Challenge following Microsoft's Bill Gates and Facebook's Mark Zuckerberg.