Not to belabor the issue, but one more clue.

ANY words in the song will work (moon, june, spoon, etc.). So, even if you have only one line, you may be able to get a hit if you use a key word or two. You may hit on a bunch of other songs, too, but so what. This helps when songs have many variants, or you haven't got the foggiest notion of the title or the rest of the words.

...Tiger