On July 13th, Jimmy Buffett will release his new album License to Chill ? and it's filled with a who's who of country guest vocalists. Nine of the album's 16 tracks feature Jimmy singing with artists he reportedly handpicked. The album's first single is a cover of the Hank Williams classic "Hey Good Lookin'," which features Jimmy and buddies Clint Black, Kenny Chesney, Alan Jackson, Toby Keith and George Strait. Alan joins him later on another song, "Boats to Build." Clint, Kenny, Toby and George also have duets with Jimmy, as does Martina McBride, soul singer Bill Withers and folk artist Nanci Griffith.