19 Years Ago: Alan Jackson, Jimmy Buffett Hit No. 1 With ‘It’s Five O’Clock Somewhere’19 Years Ago: Alan Jackson, Jimmy Buffett Hit No. 1 With ‘It’s Five O’Clock Somewhere’On Aug. 9, 2003, Jackson and Buffett hit No. 1 with "It's Five O'Clock Somewhere," from Jackson's 'Greatest Hits II' album.Gayle ThompsonGayle Thompson