Yeh everyone should get it, you kow when your mind goes blank and you have this tune in your head and you don't know what it is.
Was reading the newspaper earlier and it mentioned this website, where you if you have a tune in your head and you don't kno what it is, you can actually whistle it into your computers microphone and the site will come up with the tune.
It worked in the news paper, when they tried whistling Mozart into it, haven't tried it myself yet, but try it and check it out:
www.name-this-tune.com