TheSingingMixer: #PeterPaulAndMary are my favorite fantastic #folk harmonizers, & #LeavingOnAJetPlane is an absolutely gorgeous example. @Don Fitz & @myrealnameisann performed it beautifully - I had to #joinin! There's more squares to #joinmycollab with vocals, guitar, bass, ? #acapella, #collab, #60s #musicofmyyouth.#tsm