Kelly sang many defining versions of traditional songs like "The Black Velvet Band", "Whiskey in the Jar", "Home Boys Home"; but also Phil Coulter's "The Town I Loved So Well", Ewan MacColl's "Dirty Old Town", "The Wild Rover", and "Raglan Road", written by the famous Irish poet Patrick Kavanagh.
Kelly sang mange definnerende versioner af traditionelle sange som "The Black Velvet Band", "Whiskey in the Jar", "Home Boys Home"; men også Phil Coulter's "The Town I Loved So Well", Ewan MacColl's "Dirty Old Town", "The Wild Rover", og "Raglan Road" skrevet af den berømte irske poet Patrick Kavanagh.