Barak Obama sings the blues.

Barack Obama sang the blues at a White House concert held on Tuesday, Feb. 21, to celebrate Black History Month, a scene made all the more surreal by the sight of the microphone being handed off to the president by Mick Jagger.

The Rolling Stone was on stage at the time with B.B. King, Jeff Beck, Buddy Guy, Susan Tedeschi, Warren Haynes and more when Guy coaxed Obama to join them on "Sweet Home Chicago" and an event called "In Performance at the White House: Red, White and Blues."

"We would like to get you to help us sing because I heard you singing Al Green," Guy said, referring to Obama's rendition of "Let's Stay Together" at a fundraiser last month. "So you done started something. You gotta keep it up now!"

The president declined at first, but Guy persisted until he'd accepted the microphone hand-off from Jagger. And he didn't sound half bad. He sang the first half of the chorus, held the mike for King to sing the lyric "Same old place," then finished the chorus with "Sweet home Chicago."