THE One Show fans couldn't believe Dannii Minogue's real age as the 'sensational' star plugged her new dating series.

Thursday's show saw Alex Jones and Ronan Keating once again broadcast from Liverpool during Eurovision week.

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They were joined by Dannii, who spoke about Australia's entry this year - the band Voyager - as well as her new BBC Three dating show, I Kissed A Boy.

However, The One Show viewers were too distracted by Dannii's youthful and stylish appearance.

Dannii looked fantastic in a turquoise strapless dress which hugged her petite frame and featured a bodice which was held together by three bows.

The garment also had a thigh high split and Dannii teamed it with high heels and had her blonde hair straight and loose around her shoulders.

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Taking to Twitter, one viewer couldn't get over her real age, writing: "Dannii Minogue is almost 52. She looks about 30.”

Another added: "Danni looks sensational...wowser!"

Meanwhile a third tweeted: “Dannii looks incredible! “

A fourth agreed, writing: “Dannii looks b****y gorgeous!!!”

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Dannii is 51 and will celebrate her 52nd birthday in October.

The star is three years younger than older sister and fellow pop star, Kylie Minogue.

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The One Show airs weekdays at 7pm on BBC One.