Keith Moon died in the SAME London apartment as this person did. Who is the person?

Keith Moon, who died on September 7, 1978, died in the same room as Cass Elliot, known as Mama Cass, singer for the Mamas and the Papas. Cass Elliot died there on July 29, 1974. That room saw the deaths of two GREAT musicians.

Cass Elliot

Mama Cass, whom I also adore.

Peter Sellers