Michael Bublé sings beautiful duet live on stage with 90-year-old fan!

Attending her first ever concert, Michael Bublé made sure this 90-year-old fan experienced a night she'll never forget!

During his show in Dublin this week, the 43-year-old singer couldn't help but notice Mary Kelleher singing along to every song.

So, of course, Michael approached Mary to serenade her and before she knew it, she was belting out Vera Lynn's 'You'll Never Know' with the Canadian Crooner.

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Other concert-goers took to social media to share the adorable moment caught on camera.

Bublé is currently on his Don’t Believe The Rumors tour, which is his first time on the road since announcing his five-year-old son Noah had been diagnosed with cancer in 2016.