I have a vivid memory of an advert for a Spongebob marathon sometime during the 2000s. It was a promo for the top-rated episodes of Spongebob, and ended off with a special episode that was a musical (I think). I never got to see that special, as I went on a vacation with my family. I tried looking it up online yesterday, but I couldn't find anything that looked like what I saw back then.
I think there was a website for it, but I don't remember what it was called. I'd like to see it again, for nostalgia's sake.