Obviously in '69 because that was a big hit then by the late Oliver. I guess it's fitting that they had that muppet character, Big Jeffy I believe his name was? And the other 'hippie' anyhting muppets. Can't understand why the girl though. That was the anything muppet from the first show. Bob had on this real psychedelic like shirt on. Say what you will, but I actually like listening to this song whenever it's on the radio. Being born in that time period, I just swing more towards music from the 60s and 70s.