Helen, try Joe Heaney:

https://www.youtube.com/watch?v=oGelrimeD7c

Heaney first recites the words in English, then starts singing in Irish at about 1:20.

I'd call it "fioritura" all right.

Seamus Ennis sings, in English, in a similar style:

https://www.youtube.com/watch?v=C0Ce7BaOBhA