The backing track is actually Pachelbel's Canon, one of the most famous pieces of classical music. The Vitamin C song used that as the melody, not this. It's actually used pretty frequently in pop music. My Chemical Romance - Welcome to the Black Parade is another example. There's a whole list of them here - http://www.whosampled.com/search/samples/?q=pachelbel%27s%20canon
I remember as a 6-year-old this song so well, but untill yesterday I've only remembered the melody and a black man standing on a cliff wearing white clothes. Randomly my teacher used this song as an example of postmodernistic music, and all my childhood memories found their places again! Fantastic.