The viewing public, voting by phone and text, has chosen a John Waters/ Tommy Moran composition, 'They can't stop the Spring', as Ireland's entry for the 52nd Eurovision Song Contest.
The song will be performed by traditional music band Dervish in Helsinki in May.
Pat Kenny announced the winner after Dervish performed the four contending songs on the Late Late Show last night.
Mr Waters said the song combined an Irish flavour with a European theme.
'Tommy gave me the melody, and I had this line in an old song which we'd never be able to do anything with, a line from Alexander Dubcek in the Prague Spring in '68 when the tanks came in from Moscow into Prague and the students came out and threw the flowers.'
'Dubcek said: 'They may crush the flowers, but they'll never stop the Spring, you can't stop the Spring'.
'And that line I mean it's just kept coming back to me and particularly now in Ireland you know we've got so many people from Eastern Europe, Czechs and Poles and Latvians - it's about the new Ireland as well,' Mr Waters said.
