While the band worked on "The Notorious Byrd Brothers" album throughout late 1967, there was increasing tension and acrimony among the members of the group, which eventually resulted in the dismissals of Crosby and Clarke. McGuinn and Hillman became increasingly irritated by what they saw as Crosby's overbearing egotism and his attempts to dictate the band's musical direction. In addition, during the Byrds' performance at the Monterey Pop Festival on June 17, 1967, Crosby gave lengthy in-between-song speeches on controversial subjects, including the JFK assassination and the benefits of giving LSD to "all the statesmen and politicians in the world", to the intense annoyance of the other band members. He further irritated his bandmates by performing with rival group Buffalo Springfield at Monterey, filling in for ex-member Neil Young. His reputation within the band deteriorated even more following the commercial failure of "Lady Friend", the first Byrds' single to feature a song penned solely by Crosby on its A-side.