This is going to be both on topic and off topic at the same time, but could any of you please put my mind at rest? My love of Friendship is Magic coupled with the fact I kept remembering that one tiny event from the first Generation of My Little Pony that I saw as a kid (which I may never have even remembered had Friendship is Magic not inspired me to think back to whether I'd have liked either FIM ponies, or even the older ponies as kid) have lead me to finding out as much as I can about the previous generations as I can.

While doing so, I saw an episode with this song towards the end. Now, I know for a fact that I only saw the start of a completely different episode as a kid, and that's it. Between then and Friendship is Magic I was under the delusion that as a boy, I should hate ponies, so I never saw this episode as a kid. So how come it feels like I've heard the song before?!

Is this song used in something else other than My Little Pony? Or is this song based on another song as homage, the same way Art of the Dress is based on another song? Bronies and Pegasisters of EoFF, I'd appreciate you setting me straight on this one.