This is a fairly new and upcoming Irish comedian.
This performance is on The Late Late show which is probably the equivalent of Letterman in the States or Parkinson in UK.


Stand up and fight until you hear the bell,
Stand toe to toe, trade blow for blow, Keep punchin' till you make your punches tell,
Show that crowd what you know! Until you hear that bell, that final bell,
Stand up and fight like hell!" - Chorus from the Munster Rugby anthem sung before matches.
Irish by birth, Munster by the grace of God