Sleep, but of course! It's good for the soullllll.
Then again, I always crave sleep... ;P

Apparently it's She Holds the Key by Gavin DeGraw. However, occasionally I clear the play count of songs on my most-played list that have counts over 100 plays. I think there are several songs on my iPod (not including She Holds the Key) that I've cleared several times.... ;p