Australian X Factor finalist Jai Waetford is releasing an EP on Dec 6th (Thanks to Stina for the info) and according to the track listing, it contains a duet with Ronan! The song is titled When A Child Is Born. You can order the CD online from JB Hifi or Chaos, and yes they do ship overseas.

Update: We're informed that Ronan does not actually sing on the track, but speaks a couple of lines in between Jai's singing. Apparently it is quite beautiful, so should be worth getting!