Well it was supposed to be a secret until the recorded TG4 selection shows were all broadcast but it has been leaked via digital download outlets that the Irish entry at the 2018 Junior Eurovision Song Contest will be by Muireann McDonnell and her song Súile Glasa (Green Eyes). It is not possible to play the song yet but it is visible to see.
You can see Muireann perform her winning song below.
Source: ESC Covers; wiwibloggs