John Driskell Hopkins is an American musician best known for his role as a founding member, vocalist, multi-instrumentalist, and songwriter for the Grammy Award-winning group Zac Brown Band. Hopkins co-wrote, with Zac Brown, Wyatt Durette, and Shawn Mullins, the Zac Brown Band's third single, "Toes", from their 2008 major-label debut The Foundation. It was the second number-one single for the band. Hopkins also co-wrote, with Zac Brown, Wyatt Durette, and Sonia Leigh, the second single from the band's third major-label album Uncaged, entitled "Goodbye in Her Eyes". Hopkins co-wrote the band's first number=one hit on the Billboard Mainstream Rock chart, "Heavy Is the Head", which featured Chris Cornell and was the second single from their fourth major-label studio album, 2015's Jekyll + Hyde.