Janis Joplin a version of Big Mama Thornton's "Ball and Chain", appear in the DVD box set of D. A. Pennebaker's documentary "Monterey Pop" released by The Criterion Collection. She is seen wearing an expensive gold tunic dress with matching pants. They were created for her by San Francisco clothing designer Colin Rose. Documentary filmmaker Pennebaker inserted two cutaway shots of Cass Elliot of the Mamas & the Papas seated in the audience during Joplin's performance of "Ball and Chain", one in the middle of the song as her eyes, covered by sunglasses, are fixed on Joplin, and also a shot during
The Mamas & the Papas depending on the availability of the other group members: "It was rare we were all together. Most tracks were dubbed, one vocal at a time." The Mamas and the Papas' last album of new material, "People Like Us", was released in November 1971. The only single, "Step Out" (January 1972), reached number eighty-one in the US. The album peaked at number eighty-four on the "Billboard" 200, making it the only Mamas and Papas LP not to reach the top twenty in the US. Neither single nor album charted in the UK. Contractual obligations fulfilled, the band's split was now final.