Michael Bublé has been entertaining crowds for years, but he was almost outshone at one performance in Nashville.

In a film released on YouTube, the crooner can be seen giving his microphone over to a fan in the audience called Andrew Zarrillo.

When Bublé asked him, “Want me to help you?”, Andrew replied, “No, I’m good.”

And it’s obvious to see why he was so confident, as the fan then went to the microphone with an outstanding version of Sinatra’s 1954 song, ‘Fly Me to the Moon.’

Blown aback by Andrew’s voice, Michael humorously hurried away from the stage as the crowd shouted and clapped loudly.

Andrew uploaded the fantastic event online in January 2019, with the caption: “Everyone thought it was scripted, but it’s a totally impromptu moment!”

The clip has since been seen more than 27 million times, while one user quipped in the comments: “We’ve all heard of crashing weddings. But Andrew has exposed us to crashing concerts.”

Someone else said, “This was epic. Michael Buble is handing you the mic and letting you sing Frank Sinatra! You killed it! Nice work!”

A third added, “This guy has such a voice of an angel that even Michael Bublé was surprised.”