After the Denver incident, Frank Cook was replaced with de la Parra, who had been playing the drums in Bluesberry Jam (the band which evolved into Pacific Gas & Electric). As an official member of Canned Heat, de la Parra played his first gig on December 1, 1967, sharing top billing with the Doors at the Long Beach Auditorium. This began what de la Parra refers to as the classic and perhaps best known Canned Heat lineup, which recorded some of the band's most famous and well-regarded songs. During this "classic" period, Skip Taylor and John Hartmann introduced the use of band member nicknames: