Ebbie--

Maybe "Yankee Doodle" was an earworm for General Grant. After all, he supposedly said it was only one of 2 tunes he knew--and evidently didn't know the name of the other.

But "Dream" is a fine song to sing all day since you have it in your head. And you could make up harmonies to it--it sure lends itself to that.

You could have a LOT worse songs stuck in your head.

The one I have now is "White and Nerdy" by Weird Al Yankovic--even though it strongly implies that if you read Stephen Hawkings or go to Renaissance Fairs, you're white and nerdy. Well at least I don't eat mayonnaise, which he says is another good sign of the problem.