Show Me a Smile, Live on TV?

[aleuzzi]

I have posted this inquiry before--say three or four years ago. But in light of this "Lay it All Down" video from 1971 I figured it couldn't hurt to try again.

In a book on FM published in 1977 (it was a small pocket-sized book) Stevie Nicks said she knew very little of the band before she joined, and then added "I remember seeing Christine perform 'Show Me a Smile' on TV and thought it was great she was in the band."

Does anyone anywhere know of this performance? Does anyone have it?