Ear candy made its debut (in print, at least) as the title of a 1977 album by pop singer Helen Reddy. The album has long since faded from the charts, but the term endures and it is now used widely enough to have gained entry into abridged dictionaries. Although "ear candy" is sometimes used critically to describe tunes that are considered "gooey," "sweet," or "saccharine," the people who make the music and their fans find it tasty. As one 90s band member sagely put it, does it really matter if ear candy "isn't about the secret of life"?
1977, in the meaning defined above