Way back in the days, someone on IRC mentioned they'd had a song stuck in their head for days and they just couldn't figure out what the song was. I asked them how it went, and he replied something along the lines of

  da da daada da da daada, da da daada da da daaadaa

After thinking about it for a few seconds I wrote the name of the song and the artist[1] and he replied THATS IT!

Not sure how many other songs it would work with but that one was kinda easy to be fair.

[1]: https://www.discogs.com/master/449592