US blues legend BB King performs onstage during the 45th Montreux Jazz Festival in Montreux, in this file picture taken July 2, 2011. Reuters US blues legend BB King performs onstage during the 45th Montreux Jazz Festival in Montreux, in this file picture taken July 2, 2011. Reuters
US blues artist BB King performs during his "International Farewell Tour 2006" concert in the German capital of Berlin, in this file picture taken September 7, 2006. Reuters US blues artist BB King performs during his "International Farewell Tour 2006" concert in the German capital of Berlin, in this file picture taken September 7, 2006. Reuters
BB King performs during his concert at the Cordoba Guitar Festival in Cordoba, southern Spain, in this file picture taken late July 7, 2006. Reuters BB King performs during his concert at the Cordoba Guitar Festival in Cordoba, southern Spain, in this file picture taken late July 7, 2006. Reuters
Blues legend BB King performs as part of the "In Performance at the White House" series, hosted by US President Barack Obama and first lady Michelle Obama where music legends and contemporary major artists perform to celebrate blues music and in recognition of Black History Month, in Washington, in this file picture taken February 21, 2012. Reuters Blues legend BB King performs as part of the "In Performance at the White House" series, hosted by US President Barack Obama and first lady Michelle Obama where music legends and contemporary major artists perform to celebrate blues music and in recognition of Black History Month, in Washington, in this file picture taken February 21, 2012. Reuters
Troy "Trombone Shorty" Andrews, Jeff Beck, Derek Trucks, Gary Clark Jr and BB King (L-R) perform during the "In Performance at the White House" series, hosted by US President Barack Obama and first lady Michelle Obama where music legends and contemporary major artists perform to celebrate blues music and in recognition of Black History Month, in Washington, in this file picture taken February 21, 2012. Reuters Troy "Trombone Shorty" Andrews, Jeff Beck, Derek Trucks, Gary Clark Jr and BB King (L-R) perform during the "In Performance at the White House" series, hosted by US President Barack Obama and first lady Michelle Obama where music legends and contemporary major artists perform to celebrate blues music and in recognition of Black History Month, in Washington, in this file picture taken February 21, 2012. Reuters
US blues legend BB King performs during the 46th Jazz Festival in San Sebastian, in this file picture taken July 21, 2011. Reuters US blues legend BB King performs during the 46th Jazz Festival in San Sebastian, in this file picture taken July 21, 2011. Reuters
Legendary blues guitarist and singer BB King poses with the two Grammy Awards he won for Best Pop Instrumental Performance for "Auld Lang Syne" and Best Traditional Blues Album for "A Christmas Celebration of Hope" at the 45th annual Grammy Awards at New York's Madison Square Garden, in this February 23, 2003 file photo. Reuters Legendary blues guitarist and singer BB King poses with the two Grammy Awards he won for Best Pop Instrumental Performance for "Auld Lang Syne" and Best Traditional Blues Album for "A Christmas Celebration of Hope" at the 45th annual Grammy Awards at New York's Madison Square Garden, in this February 23, 2003 file photo. Reuters
The "King of the Blues," BB King, performs at the White House, in this December 13, 2001 file photo. Reuters The "King of the Blues," BB King, performs at the White House, in this December 13, 2001 file photo. Reuters
US blues legend BB King performs for the US troops at the Tuzla airbase in Bosnia, in this July 26, 1996 file photo. Reuters US blues legend BB King performs for the US troops at the Tuzla airbase in Bosnia, in this July 26, 1996 file photo. Reuters
Blues musician BB King holds his award backstage after winning Best Traditional Blues Album with his record "One Kind of Favour" at the 51st annual Grammy Awards in Los Angeles, in this file picture taken February 8, 2009. Reuters Blues musician BB King holds his award backstage after winning Best Traditional Blues Album with his record "One Kind of Favour" at the 51st annual Grammy Awards in Los Angeles, in this file picture taken February 8, 2009. Reuters
US President George W Bush (R) honours musician BB King as one of the 2006 recipients of the Presidential Medal of Freedom in the East Room of the White House in Washington, in this file picture taken December 15, 2006. Reuters US President George W Bush (R) honours musician BB King as one of the 2006 recipients of the Presidential Medal of Freedom in the East Room of the White House in Washington, in this file picture taken December 15, 2006. Reuters
US blues legend BB King performs onstage during the 45th Montreux Jazz Festival in Montreux, in this file picture taken July 2, 2011. Reuters US blues legend BB King performs onstage during the 45th Montreux Jazz Festival in Montreux, in this file picture taken July 2, 2011. Reuters
US blues legend BB King performs during the 43rd Montreux Jazz Festival in Montreux, in this file picture taken July 12, 2009. Reuters US blues legend BB King performs during the 43rd Montreux Jazz Festival in Montreux, in this file picture taken July 12, 2009. Reuters
Blues musician BB King (C), Spanish flamenco musician Raimundo Amador (L) and Dr John share a laugh as they pose for photographers in Valencia, in this June 22, 2004 file photo. Reuters Blues musician BB King (C), Spanish flamenco musician Raimundo Amador (L) and Dr John share a laugh as they pose for photographers in Valencia, in this June 22, 2004 file photo. Reuters
Blues singer BB King accepts his Grammy Award for Best Traditional Blues Album during the pre-telecast show in Los Angeles, in this file picture taken February 21, 2001. Reuters Blues singer BB King accepts his Grammy Award for Best Traditional Blues Album during the pre-telecast show in Los Angeles, in this file picture taken February 21, 2001. Reuters