I give you Hot Cross Buns Hot Cross Buns, one a penny, two a penny, Hot Cross Buns. etc etc etc.

Was that an advertising jingle or what? Or do folklorist prefer the soubriquet "Street Cries" ?

Wikipedia claims that it started off as a street cry before being buffed up and published in the form of the nursery rhyme some of us remember from our youth. Seems to have been a traditional seasonal song as well.

The thing about the beer ads is that, although they have clearly stuck in our minds, I doubt they were ever sung for fun by the general public. 'Nice One Cyril', on the other hand, was an ad slogan for a bakery, that was turned into a football chant by Tottenham fans (or did the commercial record come first?) and spread like wildfire. People to this day still say 'Nice one!' in conversation.