 The performance of Janis Joplin (qv) and  Big Brother and the Holding Company (qv) was actually their second  time on stage that weekend. When they performed the day before,  their manager didnt want their performance to be filmed because he  didnt want his charges to be exploited. However, when their  performance was such an overwhelming success, Janis and the band  decided to go behind their managers back and performed the next  night for the purpose of having their performance in the film.