@FanOfMostEverything  
Thank you. Now I’ll be stuck with that song in my head for the rest of my day.

@RaineV1  
Dysfunction junction!  
What’s your malfunction?

My God… It’s even worse than I remember.

The one I really remember, which gets stuck in my head to this day, was a special message they used to run on T.V. about how your parents need to keep up-to-date photos of you in case you get kidnapped or lost. This was in the form of a rap. Another one they’d run had Ludwig van Beethoven rapping about the importance of…something. I don’t remember. I do remember those guys who rapped the multiplication tables so you could remember them.
 
I guess my point is that there used to be lots of cringe-worthy educational rapping to go around. Pinkie’s rap is a hilarious parody that really hits it on the nose.

@MeshGearFox  
Which song was that?

@FanOfMostEverything  
All of the others mentioned, plus Lucky Seven Sampson.
 
But ‘Three is a Magic Number’ is still how I mentally count by threes.

@sumbozo  
That took longer than I expected.

I may be the only one who gets the Simpsons ref here.
 
Abe Lincoln rapping about Duff beer!

@FanOfMostEverything  
As long as I live, I doubt I’ll ever get the tune of Conjunction Junction out of my head.

@FanOfMostEverything
 
There’s also Three is a Magic Number, and the De La Soul song that sampled it :333

Hey, Schoolhouse Rock was pretty catchy. I still get “Lolly, Lolly, Lolly, Get Your Adverbs Here” stuck in my head.

vanilla ice and 2 pac are now ponies too ?

Yup. It’s the digital rights protection guy.  
Mr. “Don’t Copy That Floppy”.