At Woodstock in 1969, four iconic singers performed: Joni Mitchell, ARLO Guthrie, Joan Baez, Richie Havens, Carlos Santana, and Jimi Hendrix. Joni Mitchell is a Canadian singer-songwriter known for her poetic lyrics and unique vocal style. ARLO Guthrie is an American folk singer and songwriter, best known for his 1967 hit 'ALICE's Restaurant Massacree'. Joan Baez is an American folk singer and activist, who has been performing since the 1960s. Richie Havens is an American folk singer and guitarist, best known for his opening performance at Woodstock. Carlos Santana is a Mexican-American rock guitarist and bandleader, whose band Santana was one of the most popular acts of the late 1960s and early 1970s. Jimi Hendrix was an American rock guitarist, singer, and songwriter, who is widely considered to be one of the greatest and most influential guitarists in history.