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Former U.S. President Bill Clinton hugs Willie Nelson at a concert in New York City April 9, 2003. The concert was held to celebrate Nelson's 70th birthday. (REUTERS/Jeff Christensen)

Bill Clinton's celebrity circle

Former President Bill Clinton has acquired a stellar list of famous friends over the course of his presidency and recent work with the William J. Clinton Foundation. He will be joined by several of these A-list pals at "A Decade Of Difference: A Concert Celebrating 10 Years Of The William J. Clinton Foundation" on October 15.