Mac Powell - The Vine.co and Byne Christian School present Mac Powell with special guest David Leonard of All Sons and Daughters. The 'River Of Life' brings Mac Powell back to his roots. The four-time Grammy Award winner spent nearly three decades fronting legendary Christian rock band Third Day before embarking on a solo career. David Leonard of All Sons and Daughters and NEEDTOBREATHE will bring a special night of worship with songs like Great Are You Lord and Wait.