Lee Michaels

Lee Michaels (born Michael Olsen, November 24, 1945, Los Angeles, California) plays the Hammond organ, piano, and guitar (plus vocals), and is best known for his 1971 Top 10 pop hit single, "Do You Know What I Mean."

Michaels began his career with The Sentinals, a San Luis-based surf group that included drummer Johny Barbata, later of The Turtles, Jefferson Airplane, and Jefferson Starship. Michaels joined Barbata in the Strangers, a group led by Joel Scott Hill, before moving to San Francisco. There he joined an early version of The Family Tree, a band led by Bob Segarini.[1] In 1967, he signed a contract with A&M Records, releasing his debut album, Carnival Of Life, later that year. As a session musician, he played with Jimi Hendrix, among others.

Source: http://en.wikipedia.org/wiki/Lee_Michaels