Obama joins Jagger to belt out blues

WASHINGTON - The president just couldn't say no: Mick Jagger held out a microphone almost by way of command, and soon Barack Obama was belting out the blues with the best of them.

The East Room of the White House was transformed into an intimate blues club on Tuesday night for a concert featuring blues all-stars of the past, present and future - and the president himself.

The surprise performance by Obama came at the end of the playlist when the blues ensemble was singing Sweet Home Chicago, the blues anthem of Obama's home town.