What's this vocal piece in the beginning of episode 18? I'm on episode 18 of Cowboy Bebop, and I noticed vocal background music sung by a male singer that seemed rather classical in style at the beginning, when there is a montage of Faye at a horserace.

What is the title of this piece? Is it something classical music, or is it an original soundtrack-specific composition? The Wikia for the episode doesn't seem to give me anything.
The lyrics are clearly from the song  Adieu (lyric: Brian Richy, singer: Emily Bindiger):


  Been a fool, been a clown 
  Lost my way from up and down 
  And I know, yes, I know 
  And I see in your eyes that you really weren't surprised at me 
  At all 
  Not at all 
  And I know by your smile 
  It's you 


However the singer in episode 18 is male and I haven't managed to find who he is yet.