7. Bobby McFerrin - 'Don't Worry Be Happy'
The one-hit wonders are really getting hammered here. If it's any consolation, Bobby McFerrin isn't all that fond of this song either. He hasn't played it in years, saying he just got way too sick of it. The lyrics are inspired by a famous saying from the late Indian mystic Meher Baba. The track is completely a cappella, and it's the only such song to ever hit Number One on the Hot 100.