Aside from her individual accomplishments, Janis is most famous for the time that she was married to Marvin Gaye. Janis was introduced to Marvin by producer Ed Townsend during a 1973 recording session. Marvin fell for Jan despite being married to Anna Gordy, the sister of Motown founder Berry Gordy, at the time. In 1974, Marvin wrote the song “Jan” about Janis, and his 1976 album, “I Want You,” was heavily inspired by her.

Source: https://www.distractify.com/p/jan-gaye-cause-of-death