It's safe to say the Scooby Doo, Where Are You! theme song is one of, if not the, most iconic theme songs in television history, and we can't hear the words "Scooby Doo" without having that catchy song come to mind.
And once you watch The Holophonics cover the Scooby Doo theme song you'll hear their ska version of the song in your head instead of the original!
-Via Laughing Squid