The Australian PM and his New Zealand counterpart have been talking about their admiration for each other and will even have a sleepover at Malcolm's house.

OPINION: While New Zealand Prime Minister John Key lived it up in Point Piper over the weekend so too did his son Max, who Kiwi media have dubbed "The Fresh Prince of Parnell".

For his official visit to Sydney, and perhaps the subsequent sleepover at the Turnbull's waterfront compound, Key and his wife Bronagh have been accompanied by Max – their 20-year-old musician son.

Max is no stranger to official business, having previously played golf with US President Barack Obama and been invited to stay at Balmoral Castle in Scotland as a guest of the Queen.

MAX KEY/INSTAGRAM Max Key with his ex-girlfriend Amelia Finlayson - the reported inspiration behind Key's first single 'Forget You'.

However, the timing of this trip across the Tasman with his parents, and a cast of several business delegates, is curious considering he released his first single Forget You on Friday.

READ MORE:

* Christchurch radio station 'bans' Max Key single

* Max Key to release debut single and join George FM

* Max Key splits with girlfriend Amelia Finlayson

* Is Max Key too famous for his own good?

* Max Key, fresh prince of Parnell

* Max Key's musical career takes off

* Hear Max Key's Forget You in full

Sure, the fair city is a treat to take in at this time of year but like most fledging musos why wasn't he embarking on a promotional tour around the land of the long white cloud?

The answer could because the DJ shuns press – at the request of his dad's office – so he's instead taken a leaf out of the Beyonce book of PR and relied on social media to generate the spin about his song, which has since been banned from at least one radio station back home.

Christchurch alternative radio station RDU threatened to cancel the show of any presenter that plays Max's debut track – a dance song reportedly inspired by his ex-girlfriend Amelia Finlayson, who he recent broke up with after she holidayed with the family in Hawaii at Christmas.

"We here at RDU have officially banned the new Max Key single Forget You. This is an Anti-TPPA zone (Tune's Piss Poor Aye) and anyone caught playing the single will be pulled out of the studio by the ponytail and their show will be cancelled," the station posted on its official Facebook page. "We indeed would like to forget you."

MAX KEY/INSTAGRAM Max Key with his ex-girlfriend Amelia Finlayson and his parents, Bronagh Key and New Zealand Prime Minister John Key.

The station was criticised for basing the decision on Max's close association to the National Party but said the decision was based "purely on song".

"We have the upmost respect for real musicians and artists. However, having suffered through listening to this song we can guarantee this does not meet the RDU standard."

The snub is unlikely to trouble Max, a former McDonald's employee, as he has his own late night show on a rival station where presenters have reportedly been told by management any and all social media regarding hosts must be positive.

It also hasn't harmed sales of the single as it took less than 24 hours to enter the top 10 in the local dance music charts. With more than 33,000 fans across Facebook, Snapchat and Instagram, social media is his main outlet of expression which he uses to promote his upwardly mobile lifestyle.

According to Instagram, Max, a commerce student and surf lifesaving volunteer, enjoys whitening his teeth and lounging in hammocks in tropical locations such as Fiji.

He won't talk to the media, but is chatty on the online Q&A forum ASKfm where he fields questions on a range of topics including his relationship with his dad. "We can both be very stubborn," he said.

Whether he talks to strangers or fans "depends if they treat me like a normal person or if they froth over Dad," he said. "I hate getting attention about Dad because I've done nothing to deserve it."

Have a listen to Max Key's Forget You.

