Jacintha Saldanha had committed suicide after a prank call about Princess Kate from an Australian radio channel.
The body of an Indian-origin nurse, who died after being duped by a prank call to a UK hospital, was on Friday flown to India.
The Australian Communications and Media Authority said it was using its special powers to launch a rare "own motion" probe.
Princess Kate and her sister Pippa Middleton are back making news in fashion circles, thanks to their lookalikes.
While Pippa is princess of casual chic, her sister Catherine Middleton is queen of the formal dress code.
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