Prime Minister Malcolm Turnbull says he's disappointed the material has been leaked.
He's told Channel 7, it was all just a bit of fun.

The federal government has called a three month national gun amnesty, the first since the Port Arthur massacre in 1996.
Justice Minister Michael Keenan says the amnesty will aim to keep some of Australia's 260,000 illegal guns out of terrorists' hands.
Federal Labor has supported the amnesty.
Opposition frontbencher Anthony Albanese has told Channel 9, people should hand in weapons.
A federal Nationals M-P in NSW says he's worried about a hike in power prices.
Origin Energy has joined A-G-L and Energy Australia in increasing retail prices for NSW customers.
Electricity bills will spike by abour 16 per cent for the state's Origin customers, with gas prices also rising by about eight per cent.
Federal member for Parkes, Mark Coulton has told the A-B-C his electorate will be hit hard.
Gross debt has ticked over $500 billion for the first time in Australia's history.
But Treasurer Scott Morrison argues net debt is coming down under the coalition government.
He says the rate of debt growth had fallen from more than one-third to less than 10 per cent
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