Fill in the Blank

This is sort of inspired by a Writer's Block from LiveJournal. It was a few weeks ago, but they asked about our favorite commercials. Out of the blue yesterday, I suddenly remembered this commercial for Poptarts Crunch (a cereal that didn't last very long, although Poptarts are still going strong):



This commercial lives in infamy with me and my sisters because we discovered one day that you could substitute any word in the song for "poptart" and it became hilarious (in that 'we were kids' way). I specifically remember that the first thing we used was Gargoyles, which should give you an idea of when exactly this was.