Answer
"Rumours" is not an album by Cass Elliot. It is the eleventh album by the British-American rock band Fleetwood Mac, released in 1977. Cass Elliot, also known as "Mama Cass," was a member of the American vocal group The Mamas & the Papas, and her most famous albums with the band include "If You Can Believe Your Eyes and Ears" (1966), "The Mamas & the Papas" (1966), and "Deliver" (1967).