Wendy Haas

Wendy Haas-Mull (born c. 1950) is an American vocalist and keyboardist best known for her work with the bands Fanny (2), Santana and Azteca. Biography. Growing up in the San Francisco Bay Area, Wendy Haas began her musical career in her mid-teens, playing bass, keyboards and singing. Haas attended Woodside High School in Woodside, California.