All-4-One was a soul and pop vocal rock group from California. The greatest hit by All-4-One was I Swear, a country hit just a few weeks earlier by John Michael Montgomery. The All-4-One version of I Swear spent three weeks at number one. The song became a graduation and marriage favorite. The first pop music hit by All-4-One was So Much In Love, a remake of the song by The Tymes whose version hit number one in 1963.