We all know the great song "Somebody That I Used to Know" from Gotye. There are lots of great parodies made - maybe you've seen some of them.
The original is always the best
Walk off the Earth
What about: Some Study That I Used to Know
Or maybe you are more into animals stuff: Some Doggy That I Used To Know
You must see these guys - hilarious: Somebody Who Used to Be My Bro
And there are many many more on Youtube