Ronan Keating and Robbie Williams' 'special' song dedicated to Boyzone's Stephen Gately

It's still hard to believe today marks 13 years since Boyzone member, Stephen Gately, passed away.

Last year, his bandmate Ronan Keating honoured Stephen - who tragically passed away aged 33 at his holiday home in Majorca, on 10 October 2009 - in the best way he knew how.

The 45-year-old pop star released a special duet with Robbie Williams that was written in tribute to Stephen.

Speaking on Goss.ie's chat show Goss Chats, Ronan said Robbie contacted him out of the blue about the song, called 'The Big Goodbye.'

"Robbie emailed me out of the blue," he shared.

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"It was Stephen's 10th anniversary, and the boys and I were doing a TV show in London. Robbie saw the show and he emailed me that night," he explained.

"He said 'hey Ro, I have this song I wrote and I wrote it the week Stephen died.' And I'm standing in my kitchen, listening to this song with tears running down my face.

"I said 'let's do something together on it it would be lovely.' And then we worked on this record, it's a very special song."

What a beautiful way to remember Stephen.