Name of Sesame Street song?

Question

There was a song on the original Sesame Street program where 3 monsters each come in the screen and make a sound, then they make a song of it. I'm not talking about the Mahna Mahna song from the muppet show with the two pink monsters and the other one. This was three monsters who made sounds like "berladop" and another went "brrrrr"

Answer 1

I remember that a little, don't remember enough to help you.
But, "Do You Wanna' Buy An 'O' ?"

Answer 2

There's a Muppets / Sesame Street CD called "Music, Mayhem and More." Maybe the song is on it.