Sister Act - Kylie and Dannii

Kylie fans were treated to a rare sighting... a duet with her little sister Dannii.

Rumours had been rife that the star would be joined on stage by Robbie Williams to sing their 2000 hit Kids on the last weekend of her Australian Showgirl tour.

But although Williams was in Melbourne on Saturday, he was spotted playing football and meeting friends in a hotel bar instead.

Today he had a better excuse - he was performing in his own show in the city.

On both nights Kylie was joined by her sister Dannii, 34, to perform the song at Melbourne's Rod Laver Arena.

Kylie, 38, wore a leopardskin body stocking and matching basque while Dannii was equally sexy in her black basque and fishnets.

They hadn't performed together in Melbourne since they appeared on a showcase for young talent 20 years ago.

Kylie told the audience: "You waited a long time for this, didn't you?" She also thanked Dannii for her support during her breast cancer treatment.

Kylie brings her show to Wembley on New Year's Eve.

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