Dermot Kennedy and Daniel Ricciardo join Zach Bryan on stage

Dermot Kennedy, Daniel Ricciardo and Zach Bryan

Though it sounds like the start of a bad joke this really happened at Flemington Racecourse in Melbourne when Zach was on stage.

Dermot was already down under for his Sonder tour, performing at the Sydney Opera House from Wednesday to Friday and decided he might as well pop over to say hi.

Yet the lads didn't just have some casual chat backstage and maybe a few quiet drinks later, the Irish man and the Australian ended up forming an impromptu band.

The trio performed Zach's new hit single Boys of Faith live for the first time together for a shocked crowd of fans.

Daniel later shared some snaps from the wild night out, gushing about meeting the two singers.

The first photo showed himself and Dermot posing backstage at his Sydney show. Next was a video of Dermot dragging the driver out on stage to join Zach.

To round things off Daniel posted a picture of himself and Dermot in hysterics laughing and to be honest we can't decide who we're more jealous of.

The Aussie captioned his post: "Weekend musical adventures/fanboying." Same here Daniel, same.

Fans lost it when they saw the post as their worlds seemed to collide.

"This can‘t be real… my favourite F1 driver with one of my favourite artists Dermot live on stage!" commented one individual.

Another added, "This is a crossover I didn’t know I needed but it’s everything."

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