 If Wonder were to join forces with Bennett, it would not be for the first time; their rendition of "For Once in My Life" earned them a Grammy for best pop collaboration with vocals in 2006.Wonder's harmonica playing can be heard on the 2009 Grammy-nominated "Never Give You Up", featuring CJ Hilton and Raphael Saadiq.Wonder did a 13-date tour of North America in 2007, starting in San Diego on August 23; this was his first U.S. tour in more than 10 years.