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President Barack Obama and first lady Michelle Obama listen to performance during the White House Music Series saluting Blues Music in recognition of Black History Month, Tuesday, Feb. 21, 2012, in the East Room of the White House in Washington. On stage from left to right are Troy Trombone Shorty Andrews, Jeff Beck, Derek Trucks, Gary Clark, Jr., B.B. King, Buddy Guy, Warren Haynes, Shemekia Copeland, Susan Tedeschi and Keb Mo. (AP Photo/Pablo Martinez Monsivais)

President Barack Obama and first lady Michelle Obama, center, listen as B.B. King, left, and others perform during the White House Music Series saluting Blues Music in recognition of Black History Month, Tuesday, Feb. 21, 2012, in the East Room of the White House in Washington. (AP Photo/Pablo Martinez Monsivais)

B.B. King, is greeted by Jeff Beck, as they stake the stage to perform during the White House Music Series saluting Blues Music in recognition of Black History Month, Tuesday, Feb. 21, 2012, in the East Room of the White House in Washington. (AP Photo/Pablo Martinez Monsivais)

L'Wren Scott, center, fashion designer and long-time companion of Mick Jagger, is seen in the audience during the White House Music Series saluting Blues Music in recognition of Black History Month, Tuesday, Feb. 21, 2012, in the East Room of the White House in Washington. (AP Photo/Pablo Martinez Monsivais)

B.B. King, left, Buddy Guy from Chicago, and Warren Haynes, right, perform during the White House Music Series saluting Blues Music in recognition of Black History Month, Tuesday, Feb. 21, 2012, in the East Room of the White House in Washington. (AP Photo/Pablo Martinez Monsivais)

B.B. King, left, performs during the White House Music Series saluting Blues Music in recognition of Black History Month, Tuesday, Feb. 21, 2012, in the East Room of the White House in Washington. (AP Photo/Pablo Martinez Monsivais)

President Barack Obama welcomes guests during the White House Music Series saluting Blues Music in recognition of Black History Month, Tuesday, Feb. 21, 2012, in the East Room of the White House in Washington. (AP Photo/Pablo Martinez Monsivais)

US President Barak Obama introduces music legends and contemporary major artists at the White House for a celebration of Blues music and in recognition of Black History Month as part of their In Performance at the White House series in Washington, DC, February 21, 2012. AFP PHOTO/Jim WATSON