him at TV Record's 1967 III Festival da MPB, where they performed Gil's "Domingo no Parque" with the addition of Rogério Duprat conducting an orchestra with his revolutionary arrangements. Gil's friend Caetano Veloso also performed with a rock group (São Paulo band Beat Boys), and although the novelty of electric instruments and the general irreverence of the mixing of western pop and strange orchestral sounds irritated some in the festival audience, both performances ultimately won approval, with Gil coming second and Veloso taking fourth place. Within a year, however, the nascent Tropicalia movement would face strident opposition from both the military junta that ruled Brazil at the time, and from Brazil's student left, who regarded the Tropicalistas' dalliance with Western pop as a sell-out. Soon after, Os Mutantes recorded their single "O Relógio". In 1968, Os Mutantes performed on the album/manifesto Tropicália ou Panis et Circensis (Philips), with Nara Leão, Caetano Veloso, Gilberto Gil, Gal Costa, and Tom Zé. This was also when they recorded their first LP, Os Mutantes, and they also backed Gilerto Gil on his second self-titled solo album. In September 1968, Os Mutantes backed Caetano Veloso during his two notorious performances in TV Globo's Third International Song Festival in Rio. The ensemble was met with howls of disapproval from leftist students in the audience at their first-round appearance, due to their challenging psychedelic music, as well as Veloso's lurid costume, and his sexually provocative stage moves. The confrontation climaxed in the second round of the competition on 15 September, when Veloso performed his newly-written psychedelic protest song "É Proibido Proibir" ("It is Forbidden to Forbid"). Left-wing students in the audience (who were strongly opposed to the Tropicalismo experiment) loudly abused, booed and jeered the performers, and pelted the stage with fruit, vegetables and paper balls. A large group in audience showed their disapproval by turning their backs to the stage, prompting Lee and her bandmates to turn their backs on the audience, and Veloso responded angrily to the heckling, haranguing the students at length for their conservatism. The group also performed their "Caminhante Noturno", which won seventh place. In the same year, they participated at the IV FMPB with their "Dom Quixote" and, by Lee and Tom Zé, "2001". At the end of this year, they performed with the Baianos at the Sucata nightclub, Rio, and recorded their second album, also self-titled. In 1969, following the