Imagine Dragons frontman Dan Reynolds has given a young band an experience they’ll never forget, joining them for a Halloween jam session last week.

Ask any young musician, and they’ll likely tell you that their dream is to get their big break after being noticed playing music in their garage.

For most, it’s a dream that will go unrealised, but for one group of youngsters in the US, they’ve managed to gain some worldwide fame after taking part in an impromptu jam session with Imagine Dragons frontman Dan Reynolds.

As TMZ reports, the incident happened on Halloween last week in Las Vegas, where Reynolds had been out tick-or-treating with his wife and family.

Check out ‘Radioactive’ by Imagine Dragons:

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While walking around the neighbourhood, Reynold stumbled across a local group by the name of Streetfolkband playing in their driveway.

After recognising the Imagine Dragons singer, the band requested Reynolds jam with them, and after he questioned their knowledge of his group’s chart-topping songs, Streetfolkband soon found themselves performing ‘Radioactive’ with a special guest.