Gladstone Anderson (born 18 June 1934), also known by his nickname "Gladdy", is a Jamaican pianist, keyboard player, and singer, who has played a major part in the island's musical history, playing a key role in defining the ska sound and the rocksteady beat, and playing on hundreds of recordings as a session musician, a solo artist, and as leader of Gladdy's All Stars, featuring bassist Jackie Jackson, drummer Winston Grennan, guitarist Hux Brown, and keyboardist Winston Wright.