2016 - An tEarrach Thiar
2015 - Colscaradh
2014 - An Spailpín Fánach
2013 - Mo Ghrá-sa (idir lúibíní)
2012 - An tEarrach Thiar
Meabh04 is right that its pretty unpredictable so its pointless in risking it but Géibheann hasn't come up yet and I don't think they would do the same poem two years in a row.