In what seems to be the generally accepted spirit of the thread:
”Sugar, Sugar” - The Archies
(Also happens to be the very first record I ever owned; cut out from the back of a “Cap’n Crunch” cereal box 😊)
Now, since there also seem to be varying (and questionable) criteria used for qualifying, let’s have some fun and take it to absurdity: “A song or tune by an artist that was very popular and the only that got a lot of airplay; and, likely the only one that the majority of listeners would recognize and associate with that artist”. From that standpoint, a “one hit wonder”:
“Birdland” - Weather Report
“The Girl From Ipanema” - Stan Getz
”Take Five” - Dave Brubeck
Then, there is that tune that goes something like “ta-ta-ta-TAAA” by that guy, what was his name? Ludwig, or something like that 😄