In 2006, Vai joined the Zappa Plays Zappa tour as a special guest, alongside additional Zappa band alumni Terry Bozzio and Napoleon Murphy Brock. In 2008, for his performance of "Peaches en Regalia" from the Zappa Plays Zappa tour, Vai won his third Grammy Award for Best Rock Instrumental Performance. Having always enjoyed the aspect of teaching and sharing his experiences in life and in the music business, Vai began a series of "Alien Guitar Secrets" masterclasses in 2006- a touring masterclass in which Vai holds open forum discussion about his own experiences in the music industry, explains the key principles to understanding success, plays to backing tracks (often inviting class attendees to jam with him), answers questions, articulates key points of guitar technique, and more importantly goes beyond the technique and into the more profound esoteric principles at play (see Notable contributions for more on this).