The singer will release a studio version of 'Flower' in the UK on September 25 after performing the ballad as part of her 2008 X tour.
According to UK Mix, the track will be an orchestral take on the song, which was recorded at Abbey Road Studios in late 2011.
The collection, which will also feature new versions of her most popular hits, is expected to be released later this year as part of Minogue's 25th anniversary celebrations.
'Flower' follows the release of previous K25 single 'Timebomb', which Minogue unveiled back in May.
Listen to Kylie Minogue perform 'Flower' live below: