In 1970, Stevie Wonder came up with a chord progression on the electric piano that appealed to him. It was a peculiar riff that revolved around the A flat/B flat scales. Shaping it into the classic ballad "You Are the Sunshine of My Life," the singer/songwriter/producer saved it until he began recording tracks that would become his Talking Book LP. It's unusual in that the first vocals heard are not those of Wonder, but those of singers Jim Gilstrap ("Swing Your Daddy") and Gloria Barley. "You Are the Sunshine of My Life" went to number one pop, number three R&B, and number one adult contemporary in the spring of 1973. Nominated for both Record of the Year and Song of the Year, it won a Grammy for Best Male Pop Vocal Performance. The Talking Book album stayed at number one R&B for three weeks, going to number one pop, and also yielded "Superstition," "Maybe Your Baby," and "You and I."