Authorities in New Zealand upped the ante on Sunday as they tried to disperse protesters from outside the country's parliament.

After Barry Manilow's greatest hits on a loop failed to dislodge the anti-vaccine mandate demonstration, which has been sat outside for almost a week, they turned to a song that strikes fear into the hearts of parents around the world: Baby Shark (Doo Doo Doo).

They even joined a sing-along to James Blunt's 2005 hit, You're Beautiful.

The British singer cheekily tweeted NZ Police on Saturday about the Manilow plan: "Give me a shout if this doesn't work."

As of Monday however, protesters have not been moved, with hundreds still remaining outside parliament.

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