In this July 17, 2011 photo, singer and songwriter Paul Simon performs during a concert at the Arena Civica in Milan, Italy. Paul Simon probably never had a vocal partner quite like Bobby McFerrin, who coaxed him onstage for an impromptu performance of a Simon and Garfunkel hit _ the highlight of opening night of Jazz at Lincoln Center&#39;s 25th anniversary season, Friday, Sept. 14, 2012 in New York. (AP Photo/Luca Bruno)
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