At the very end of Tuesday night's (February 21) 'In performance at the White House', the US President belted out several bars of 'Sweet Home Chicago.' It took a bit of good natured ribbing from blues legend Buddy Guy to convince the President to sing the impromptu duet with B.B. King. The President and Mrs Obama hosted a salute to blues at the White House on Tuesday as part of the American celebration of Black history month.
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