Robert Charlebois (25 June 1944) is a French-Canadian singer and actor.
Zappa and Charlebois
Zappa arranged and played guitar on Charlebois' track "Petroleum", recorded on 30 June 1974. However, he didn't release it right away. On 22 October 1977 Charlebois met Zappa backstage at the Forum in Montreal, Quebec in Canada. That same year "Petroleum" was released on Charlebois' album Swing Charlebois Swing (LP, Canadian Solution Ltée/Kébec Disc SN 939, 1977). 
Quotes by Charlebois about Zappa
"My only friend in American showbiz along with Stan Getz. He gave me a nice present by producing my song 'Petroleum'. I believe that he dreamed of being Varèse or Stockhausen at the end of his life. He was a workaholic who hated drugs." - Robert Charlebois, 14 November 2001, Zut boF.