Airs Friday, May 4 at 9 p.m. Since 2004, Jack Johnson has hosted annual concerts in Hawaii featuring his musician friends to raise money for the Kokua Foundation he and his wife created to support environmental education programs. This one hour radio special features the best, one-of-a-kind collaborations from past festivals. Dave Matthews, Eddie Vedder, G Love and Ozomatli join Jack on his hits and covers.