I'd read that Christine McVie used Hohner Pianet in Fleetwood Mac, but I'm not very familiar with the band and couldn't point out any specific songs that feature Pianet. Recently, though, I learned that The Midnight Special has a YouTube channel, and I watched the Fleetwood Mac appearances, partially to look for Pianets. Currently, the channel has videos of eight songs the band performed over the span of about four years, and I found two that definitely feature Pianet.
"Believe Me" on 2 November 1973, with a Pianet N:
"Rhiannon" on 27 February 1976, with a Combo Pianet:
