28th May 1966, Percy Sledge started a two week run at No.1 on the US singles chart with 'When A Man Loves A Woman'. A No.4 hit on the UK chart and No.2 when re-issued in 1987. Before the recording session, the song had no title or lyrics. The session proceeded with the expectation that Sledge would produce them for the vocal takes. When it came time to record the vocals, Sledge improvised the lyrics with minimal pre-planning, using the melody as a guide for rhythm and phrasing. The performance was so convincing that others working on the session assumed Sledge had the lyrics written down.