US President Barack Obama was left singing the blues with artists including Mick Jagger after a night of music at the White House.
The East Room of the presidential residence was transformed into an intimate blues club for a concert featuring blues all-stars of the past, present and future.
The surprise performance by Mr Obama came at the end of the playlist when the blues ensemble was singing Sweet Home Chicago, the blues anthem of Mr Obama's home town.
Buddy Guy prodded the President, saying he had heard that he sung part of an Al Green tune recently, and adding: "You gotta keep it up."
Then Mick handed over the mic, and Mr Obama seemed compelled to comply. "Come on, baby don't you want to go," the president sang out twice, handing off the mic to BB King momentarily, and then taking it back to tack on "Sweet Home Chicago" at the end.
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