6th June 1969: Frank Zappa (1940 – 1993), lead singer with the Mothers of Invention, rehearsing for a concert at the Royal Albert Hall during his European tour. (Photo by Ron Case/Keystone/Getty Images)
6th June 1969: Frank Zappa (1940 – 1993), lead singer with the Mothers of Invention, rehearsing for a concert at the Royal Albert Hall during his European tour. (Photo by Ron Case/Keystone/Getty Images)