Adelaide Gail Zappa was the wife of musician and composer Frank Zappa and the trustee of the Zappa Family Trust. They met in Los Angeles in 1966 and married while she was pregnant with their first child, Moon, followed by Dweezil, Ahmet and Diva. Gail was also the aunt of model and actress Lala Sloatman.

Frank Vincent Zappa was an American musician, composer, and bandleader. In a career spanning more than 30 years, Zappa composed rock, pop, jazz, jazz fusion, orchestral and musique concrète works; he also produced almost all of the 60-plus albums that he released with his band the Mothers of Invention and as a solo artist. His work is characterized by nonconformity, improvisation sound experimentation, musical virtuosity and satire of American culture. Zappa also directed feature-length films and music videos, and designed album covers. He is considered one of the most innovative and stylistically diverse musicians of his generation.