'You'll never walk alone', Gerry Marsden, sung by tens of thousands on a weekly basis. 'Old Faithful' sung by thousands on a weekly basis.
'Fields of Athenry' sung by tens of thousands on a weekly basis, during the season! And many others of that ilk.

Any pop song that lingers on a generation AFTER it was written, without having to undergo a 'REVIVAL'.

An American pop song written in 1908 that entered oral tradition in Britain, but I don't think it survived in America. 'My Brudda Sylvest'

Jimmy Kennedy's 'Hokey Cokey' from WWII, albeit based on earlier European songs.

Many parodies on pop songs, some of them bawdy.