The 46-year-old Irish musician's two-day run at Vicar Street may be completely different from one night to the next, but the Monday night leg of the gig sees a host of unannounced guests. Can you guess who?

Recalling an email he received about a guy who could "apparently sing Glen Hansard songs 'good'. Damien Rice 'good'. Mic Christopher 'good'," etc.., he beckons the man himself, John Byrne, to join him on stage for a song.

After much encouragement, he makes his way up front, only to be left alone with Glen's guitar. He starts to play 'Falling Slowly' but is cut short by Glen saying "Not that one!" The young man chooses 'Leave' only to forget the words for the second verse! Mr. Hansard provides no support as he seems to have forgotten as well. Thank goodness for the crowd, who tries to fill in as well.