A Whiter Shade Of Pale.

A little history

The song "A Whiter Shade Of Pale" was released in 1967 by the band Procol Harum. With its haunting tonality and Bach flavouring, both provided by Hammond organist Matthew Fisher, soulful vocals by Gary Brooker and mysterious lyrics by Keith Reid,

"A Whiter Shade of Pale" reached #1 on the British charts, was a hit in Europe, and reached #5 in the United States.
In the years since, it has become an enduring classic, and has earned extensive critical acclaim.

Rolling Stone magazine placed "A Whiter Shade Of Pale" as #57 of its 500 Greatest Songs of All Time in 2004.

British TV station Channel 4 also placed the song at #19 in its chart of the 100 greatest singles.

The musicians on the original recording:
Gary Brooker, voice and piano
Matthew Fisher, Hammond organ
David Knights, bass
Ray Royer, guitar
Bill Eyden, drums

Producer: Denny Cordell
Sound engineer: Keith Grant
Location: Olympic Studios, Barnes, London, England.
Official Release Date: May 12, 1967.

Info courtesy of: http://www.wikipedia.org/