If you're on a bus in Dublin, chances are you're going to see just about anything.
This, however, is quite unique. A drug-user had a guitar with him and decided to give the upper deck a little concert with his signature track, "Don't Take My Drugs Away".
The song has since become a viral hit and amassed 10,000 views in the space of two days.
Could it be a Christmas No. 1? Have a listen and see what you think.