'The Auld Triangle' was just one of the tunes tackled by U2 frontman Bono and Oscar winner Glen Hansard as they teamed up with a host of other illustrious Irish musicians (Liam Ó Maonlaí among them) for a Grafton Street singalong on Christmas Eve. The festive performance naturally drew a huge crowd, with all donations going to the Simon Community. You can relive some of the feelgood action by checking out the video below.