those racy old sitcoms that had us feeling groovy

 
Was it the Partridge Family that changed the lyrics of their theme song to "come on, get happy ... we'll make you happy..." ?

I remember how lame I thought the change was, though "lame" wasn't a word we used in that way in those days. Though if we'd thought of it, we would have.

And what were the lyrics anyway, before that change?