I can't say for sure in general, but for *me* personally, they definitely do. There are songs that I need a break from once in awhile, and can go back to after giving them a rest.

Then there are those that, if I never sang them again, it would be too soon. Unless we were to do something strange an unique with them and make them very different from the way we did them from the beginning of time.

Guess which ones get requested the most often??? ;D